Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85b693844ab698d…

MALICIOUS

PDF

72.8 KB Created: 2021-06-09 09:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fd06e357e35c601e5de6444adc50eb64 SHA-1: 7db8e5825c3cb60b839ac02657ee0da0d704a192 SHA-256: e85b693844ab698d76be366a931a9a8f4c0b9e90b7b04b3b82e7f77240222c76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://oniceh.ru/uplcv?utm_term=8+possessive+pronouns PDF link annotation
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/r204cnnvmdqnps4rdcd4l1jm5s/wokixemexigavi.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/sulurox.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a300109fbc2---vijarevozixenubuto.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/142ea7d4f529d20d1d1fb79ba1be157b/27639865053.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/75232246920.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/4d1f94d4abb9d95ee4354d65c5c77d37/15090922310.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/9593a4a7df16490fab08ce952a72c8d1/7119435380.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/semojipik.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9979f7811fea0a45b563f1e8c7f00dbb/lujiminixedekile.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/vepiwevusu.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/16745062129.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/3jucmvo7m5t0ddgubormgolj21/34291547692.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/69900395750.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc61dc74569---xufixemowo.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/kosugafizolazaw.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/6gt48ijovoj7jnj49vrq0adj3p/buxonafexavovisakegebep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 4732 bytes
SHA-256: b93fe1fd0e31dd5cd3a92c608eff2ca83a3be0cfa2218583f5485d97df52e4db
font_01_sfnt_off0000f10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 11660 bytes
SHA-256: c988bba949c02e8ec22b4a4787910eddc262d26945f2dadb30d47a55130522c5

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