Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12661e2c178b579…

MALICIOUS

PDF

73.5 KB Created: 2021-03-27 10:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2e72212e0316ba701588b0de52e81193 SHA-1: df95d033af790622c496779aa35687f24677664d SHA-256: e12661e2c178b579157934185b723d09a9860b35d9b688a081994e8d85d1862f
196 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of an SEO link farm, with a primary lure linking to a redirector. This redirector then points to a large collection of PDF files hosted on various domains, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gimoguvi.ru/123?utm_term=baghban+movie+songs+mp4+free PDF link annotation
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/7841036.pdfIn PDF document text
    • https://fezuliba.weebly.com/uploads/1/3/6/0/136056139/568802.pdfIn PDF document text
    • https://wovanawobudiw.weebly.com/uploads/1/3/5/3/135332940/pofegotebudased.pdfIn PDF document text
    • http://buzatukati.iblogger.org/kumomewuzisago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasaxotudulolo.epizy.com/80692540005.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/don_juan_mexican_bar__grill_ann_arbor_mi.pdfIn PDF document text
    • http://tiginusoxer.rf.gd/brc_gasanlage_bedienungsanleitung.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/zimafudijufafoku.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/free_angular_5_material_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/auctioneer_wow_addon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/74955958011.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/38767955702.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/blood_in_the_mouth_2016_movie.pdfIn PDF document text
    • http://rerununox.rf.gd/miraculous_ladybug_episode_guide_season_3.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/how_to_throw_out_old_clothes.pdfIn PDF document text
    • http://famirafopuremu.rf.gd/actions_verbs_flashcards.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/xavozukebobabevuninetid.pdfIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 5620 bytes
SHA-256: f0e93ce62b17673f773f442d96d0325e8d26c89ba8ae99e6e216435ded87797d
font_01_sfnt_off0000f3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 11048 bytes
SHA-256: 7e62e5421103dea939c6b000e8022f693d9cc6817bac78c670d09cf337e7c3bc

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