Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f62889cc50318f2…

MALICIOUS

PDF

88.6 KB Created: 2021-05-04 05:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6110734bce61808c98f4b12f0ba5d3b0 SHA-1: 17fd7008a9f1af906aaeddbd060de5fdcfd064dc SHA-256: 5f62889cc50318f205fa4899f0a2a301366fd8ba9f7ecdcb140d659309277189
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=student+personal+data+sheet+template PDF link annotation
    • https://goremafijitem.weebly.com/uploads/1/3/4/6/134617837/sutix.pdfIn PDF document text
    • https://kawuzuvom.weebly.com/uploads/1/3/1/3/131379118/lokemi.pdfIn PDF document text
    • http://tinipen.medianewsonline.com/senus.pdfIn PDF document text
    • https://komiwego.weebly.com/uploads/1/3/2/6/132695384/9638916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451757/normal_60415963437cb.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/ihhbjcq/zilusemudevezajiteji.pdfIn PDF document text
    • https://kesazawen.weebly.com/uploads/1/3/4/4/134401730/ab1d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_604b46ad4a604.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://dajedenutiwifux.weebly.com/uploads/1/3/4/3/134318988/rimumojoretuzagomapa.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/jeqLhiI/wizard_of_oz_witch_under_house.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_60270e09512e3.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ttRjaaW/good_captions_for_fb_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/miranilu/hb0zJhE/zutotonizitumenasupuroxaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450336/normal_601226fbb4715.pdfIn PDF document text
    • http://marketitaly.info/79513867197j0fen.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/cjj6Fie/modern_history_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c8f525-4882-4fdf-b6eb-3acb3f043b94/how_to_use_the_star_chart_app.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/68475818638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4454e741-99d4-4846-aef5-31c3bde6109e/16466796241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac1fec6-64b8-4928-a0df-421c2764ab61/liwer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba15fc4-cfb8-4fe5-85aa-c8b76c0264db/fimiwemoxoxuwidipatego.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C93 5304 bytes
SHA-256: 0d0a5238a70276701a17119a46383561e930bb6d588c8e6086879b8d576328e6
font_01_sfnt_off00012e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6C 11412 bytes
SHA-256: d8b55ff48255114cbbd742c2cb23cd1091ff777e1c8ca06e6b19a2a58cf9c6af

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