Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3aba59cdc749fd…

MALICIOUS

PDF

81.1 KB Created: 2021-03-07 01:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6edd34fd35fa0f26ea4f342da782ec73 SHA-1: 1d127188540f1113de924bf39c2992d3d5ec27a1 SHA-256: 3f3aba59cdc749fd19777477c1641725f873010fcdc2f4261cd3a0e0996b8d33
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links pointing to external PDF files hosted on various disposable domains, indicating a link farm or SEO manipulation scheme. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected the file as 'Pdf.Phishing.Trojan'. The presence of numerous external links suggests an attempt to lure users to potentially malicious content or to artificially inflate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=is+final+fantasy+7+on+steam+good In PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/e37caaf.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/ZxflD6h/snapple_lady_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/fotinegataso/jgYjBSl/rome_total_war_factions_unlock.pdfIn PDF document text
    • https://cdn.sqhk.co/dexijonur/fajiPMk/48161239380.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/h2uicFB/55665933049.pdfIn PDF document text
    • https://muvavibati.weebly.com/uploads/1/3/4/6/134669950/duraxezewaxineziju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465123/normal_6031b0f98ed87.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/bE8VghD/flight_attendant_salary_southwest.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ff1ba4cd2b63.pdfIn PDF document text
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/nibegesazumod_mejuferojilu.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/4358947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_600ff5903f889.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/Zjdibhj/lego_elves_queen_dragon_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/hYjILif/disney_subscription_cancel.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/hEabjLJ/zugefumat.pdfIn PDF document text
    • https://lebetazukuz.weebly.com/uploads/1/3/1/6/131606644/527210de0035a33.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/gepjgS8/helicopter_simulator_free_online_games.pdfIn PDF document text
    • https://xavodujur.weebly.com/uploads/1/3/5/9/135972692/bexusafasaj.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/tosobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/47d811ff-df98-4116-b0d0-d252d544a2b3/how_do_you_pronounce_bells_palsy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33804b8f-29d4-4086-b79b-13aa752821df/why_love_is_a_fallacy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650fe687-1b83-41c2-91f7-5daf2341bbec/toduzifupazamigutoweg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 5036 bytes
SHA-256: d007888f1496e96154b0db39873df6f648230cf9d90a85cf75db77474dde43df
font_01_sfnt_off000104ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AC 10732 bytes
SHA-256: b981899091ed5d08d77fe65d1547ddc3b0bc5c9881bf4c8a2efc32c152559257
font_02_sfnt_off00012914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12914 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.