Malicious PDF — malware analysis report

Static analysis result for SHA-256 f488fadf2c33bdc5…

MALICIOUS

PDF

81.7 KB Created: 2021-03-17 21:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 605e1c45fd718dd7e15f1e3b5e0a2efa SHA-1: f53e2192e6ec01c632cffc4dc16e10e3d62476e1 SHA-256: f488fadf2c33bdc5a52abf20f4a70ed46a9a0060566b4a30eb6b33a94ef205c0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://pelibifir.ru/wix?keyword=major+lessons+from+minor+prophets+pdf PDF link annotation
    • https://cdn.sqhk.co/jivobukafon/hjjjZjd/woodworking_projects_plans.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/1ggQSP3/best_pencil_box_for_school.pdfIn PDF document text
    • http://hotita.fun/jabomorewodadn85q.pdfIn PDF document text
    • http://1xbet-registrat.site/686751558745b9cq.pdfIn PDF document text
    • https://cdn.sqhk.co/pevukoza/VaavQNC/need_for_speed_rivals_xbox_one_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/ghV19hd/gilamafatomujubatit.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/haIDMc0/14979777450.pdfIn PDF document text
    • https://cdn.sqhk.co/laratakidev/miaddFK/89706669162.pdfIn PDF document text
    • https://cdn.sqhk.co/semubedogi/KngjgeN/bihar_rail_map.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/igijihG/25254326034.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/jfCSWge/luzazeno.pdfIn PDF document text
    • http://idem-peshkom.ru/the_divine_comedy_inferno_canto_3_summarys6z3i.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/cgfBgfi/hockey_goalie_hd_wallpapers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rorazizaxaf.atwebpages.com/blood_type_eating.pdfIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_b62a624388e848d4b916d80bde2bb093.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/piano_sheet_music_leonard_cohen_hallelujah.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/fly_to_your_heart_piano_sheet_music.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_4c8dbd081a3b4a7a90656febad453446.pdf?index=trueIn PDF document text
    • http://benamow.myartsonline.com/audio_technica_lp60_good_guys.pdfIn PDF document text
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_33e4a114996b43b796432a368dd4f7e7.pdf?index=trueIn 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_off000101fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FE 5364 bytes
SHA-256: 64bf8a2158438d89fec732e7a83aaa545506d3693aeceab27767cb1bbc7ddad7
font_01_sfnt_off0001141d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141D 10920 bytes
SHA-256: 445a1ae139dbda36b6bb3a706945c33d8045d55ad248725cb4a6bf23dd78c070

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