Malicious PDF — malware analysis report

Static analysis result for SHA-256 9386b26fb678799a…

MALICIOUS

PDF

153.3 KB Created: 2021-03-05 20:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: edd9bee1deaf8f8cacc2cdcd739d93e9 SHA-1: dbb14db16b9419fe34668bd0b65ec4b125b17744 SHA-256: 9386b26fb678799a2eea37bcd6ce50e38161eeed90c1646a45159f12020beb7e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a link farm and embeds a URL that redirects to a malicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to a trivia question, directing users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://ponafet.ru/strik?utm_term=which+three+languages+are+not+indo-european+languages PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485308/normal_5fe952887fe5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389353/normal_5fccb657c1d8b.pdfIn PDF document text
    • http://kopavavabigi.66ghz.com/ariens_snowblower_7524_engine_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fcdc1e742b10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fc8744ce0426.pdfIn PDF document text
    • http://parhelifrl.space/sony_mdr-_100abnu7u1n.pdfIn PDF document text
    • http://lolkek.xyz/fuzanijusodumorerk66en.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_602641c50cba9.pdfIn PDF document text
    • http://metryck.info/alimentos_con_hierro7wn4j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_60208e52b63d1.pdfIn PDF document text
    • http://animoney.xyz/yds_adjective_clause_testt6stu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_600ab0122eb74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_603c84aabea64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_5fd92ee82275c.pdfIn PDF document text
    • http://drovazvenigorod.ru/dragon_ball_z_stick_fight_animationl74hl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_600707d09e629.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/sozaroparafip.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/suvipefelas.pdfIn PDF document text
    • http://gevorewububew.epizy.com/78360147480.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_58c005dbdabf496d957e51aca8e0e70d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/misrepresentation_contract_law_cases.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/galiwinususunef.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_a25cb238b5354205abfd6108d16501c4.pdf?index=trueIn PDF document text
    • http://koxowasone.epizy.com/ionic_compounds_with_transition_metals_answer_key.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_b3722da32dcc4dc099ec8c3a3d661da8.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_fb647ab0c0664b91972af8fdd71b3ce1.pdf?index=trueIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_32d8806b201748888c887db72d0b8436.pdf?index=trueIn PDF document text
    • http://bunisanabasa.epizy.com/appscan_source_for_analysis_user_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E92F 5380 bytes
SHA-256: b9f822d576a142a2c53a3e6c1f37005000c4efd9702b982ca108afcc68319d12
font_01_sfnt_off0001fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB88 26272 bytes
SHA-256: c66f8c32d036a5b4b37c1fa4083e2515591941f67335189a5e8b7d2df4e475e7
font_02_sfnt_off0002404f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2404F 16316 bytes
SHA-256: a47ddc9957c46dccc20a1ee9a3b4c9fc862cd40b36ec3d60d84d861012444e20

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