Malicious PDF — malware analysis report

Static analysis result for SHA-256 b070eade3e34aaae…

MALICIOUS

PDF

96.8 KB Created: 2021-07-07 15:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5f8cc70e5320b560f43f716aab00f201 SHA-1: 768f04cef853cc84724e499a39eda71705b33078 SHA-256: b070eade3e34aaae614126a37bf746db20d7ed5613ee0876bddd57522ab13198
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/8cf2d814752d710d81164f9924c5af87/malodugapodatiruj.pdf In PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/fd7a9121bd4accacc491770209718ec8/bovigosezumamapel.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06692f07df---fokapemetoresafogex.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/tivnhfjicp0je7b17bmnvl6ie3/10296919519.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f7dd9ceb89edd814a718fcec71ada097/64499656267.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160710f4db5f0b---bibinani.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/35162592153.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16083d0db55259---bixuxudozal.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077de2eeb72a---23788559362.pdfIn PDF document text
    • http://kme-kme.cz/files/file/vifumaki.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/nivokemotisixetelisumaraf.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079968a18eef---pokolilimojubo.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eefc7a3c5---gedapidinafikagonagoni.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5cd998b2eb9467b706b1f00c0b131d4/36372959621.pdfIn PDF document text
    • http://usmleworkout.com/files/file/kejetoranusivewojemivub.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c5868d0bf7f5dd92f68f74b552bfed18/vugitirozosugoputuwigug.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/lufegubirotomexanikub.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27ce7ebe00---dezosukokegafarod.pdfIn PDF document text
    • https://promise-land.com/upload/file/2783724886.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/famasufibe.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/aca8047668813ab30da7db213226f2a6/wolitakujafatuxebuvif.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a46ba528b---nunuzijig.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/27671289543.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/mokunurifokige.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/r0r6fu5357iqrmc14tt0s58esj/tuwije.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/o4gs5uqh9dakbttcopjf3q6p0l/91756407924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=leftmost+derivation+in+compiler+designPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001110e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 10984 bytes
SHA-256: ca37453a1154c2d0c96aaee44ba2882930c6107bc054cd703ad56a664e51245f
font_02_sfnt_off00012a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A61 19940 bytes
SHA-256: 47a0f024dcc2baab2e62617f10792edf5858acc0c356dc047881e782a4ab8566
font_03_sfnt_off00015fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FDC 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7

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