Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1746a7cac6e0078…

MALICIOUS

PDF

84.2 KB Created: 2021-09-20 06:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4fd509d5a8143d52ddd1c2abf17273c6 SHA-1: 4782e2fced3591c84433ab3c69e49607978dfb95 SHA-256: d1746a7cac6e00788840a4d2b500ef87bcd91b9d51caac8e1c42d2f9ecae55e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'download button' heuristic further supports a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://luathoanghuy.com/uploads/files/renunepasodazewit.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134856e587a1---96007535669.pdfIn PDF document text
    • http://boden.boj.se/uploads/userfiles/files/62453054576.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/79500536025.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e5a187f22e458ded5c7e02c5e94171c/gemolaxagegosir.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a9572cfc4---kemixuxi.pdfIn PDF document text
    • http://esistore.com/userfiles/file/28810858780.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/pimepiguxofijovubutolu.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/2043e24d8857f508aa0c098022dc4266/gefibumejisaxemamo.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/52365375314.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/f9ibv88hf38kja1124ltf79rre/kaliroxuxezowojikekog.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/68837720324.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/tesig.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/9044030850.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4fuh0h0emplur0nfks19lkqmoq/suduwoxoletasofamufi.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/suxawofoje.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/70273420770.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/devunekiwatiko.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/61716ce2d2dab14619d9a9157c91e354/77683339640.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/sinabipizosobaxex.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/rubasakew.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/32993629476.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/tuvafeboxepugak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sooryavanshi+full+movie+download+480pPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 11512 bytes
SHA-256: 5bd498f9d4d549285ab2c0534dcabc4f44027e8725b9a354a6571c268ad1dbf2
font_02_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 17256 bytes
SHA-256: cb13120322c3ed19ed95bc425892fafa4cf9479d535a66e40ce901a5f7fa4852