Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2f2e80d34b53df…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 07:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 02bdcc8ca311b3144d1504f399a7b861 SHA-1: fa89244fdc530e332d3d652cc5b3802248282d61 SHA-256: 2d2f2e80d34b53dff751e4370b3e5409dc73b161a41c8650c086474f5bf4f49f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vt6ta84mit2t6a8v57r0vqk204/nuzogakijaketara.pdf In PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/fizevisox.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810da341ff1---13676967100.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/3u51jhgm18uc6a53l9unpqokt5/52448622761.pdfIn PDF document text
    • http://kbchina.de/upload/49694554089.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/bajomugaripobozuxiki.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/97893763338.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/39f8r4v4vf9hfqae25l3qij6nj/masidosisesenum.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/rabirunojusevuraxasod.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744e3ab2bb9---66872308015.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b8nd45oufs82i2q80n8gn6f3bo/toseviko.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b1976fbc8b5---wusaxosesapexowuduzad.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16071e42944be5---11053411332.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fa6e10cd5aeedf3488bf8c45152a4bd4/dotomuzasuzukoguzewo.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/zetokulotubosudisipilu.pdfIn PDF document text
    • https://kopari.hu/files/file/nogebaposab.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/97009869463.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/scj3hdk092kmhjtkorasinn8jl/babemake.pdfIn PDF document text
    • https://beaszemin.com/files/72556260577.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/2f72760755fd4ae8abe7c87a2b67f8b2/17158858017.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c867abc27c---79437179494.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/35882701167.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/sefonuduvorazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=la+crosse+technology+c85845+color+wireless+forecast+station+manualPDF 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_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 11460 bytes
SHA-256: c7cda6b488aefc0c16083aab44638d80c627af570c22304750215cf80b6a4261
font_01_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 17292 bytes
SHA-256: 13ae86745a8eb622e9c8717fc4c1f2e8f862acf7061cac2d7ae737353f91e297
font_02_sfnt_off000121df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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