Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9349a613778f394…

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 19:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: afbd79de2c9b67dab8c972bec2f012fd SHA-1: e29e0a142c355548a899c72a696d1a3967ffcc3a SHA-256: e9349a613778f39488b36300359900a5a7de28de25e8489fd15e2523a5899a22
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=ashes+of+love+novel+english+pdf PDF link annotation
    • http://reklama-kemerovo.ru/files/files/24625660920.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/9234abe9ccaae9ec5fec25648f91a7cb/74473056267.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/7822137722.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/48204670729.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/68739028692.pdfIn PDF document text
    • https://satesayap.com/contents/files/26906210654.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210718143331.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161011eb022660---gugapabi.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160efdae08236b---61233249054.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/0ca227a157cb2678ea02cf0acdb7acc8/ralopodusilexires.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/17e3d97d70bce6f85e6b6a84a5abf27c/26534277985.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/lugetogujake.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0f7e5be9---puzuduzimofedogalupiwu.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fb9ced048e6---65330800203.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/vudivebusebekofopikozebu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/v1ufb3s3ullk9vlvu3qnhtb991/posanarepikawujofifogutub.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127468256394---vareg.pdfIn PDF document text
    • http://xsteelstock.com/d/files/59910851193.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea03f5ec01---jilexemubo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe66e642ef---50614345930.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/d7bf4fbc72b1de17661daa07c43a68c5/vujokulusijarananezizez.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/nofogexetevoteme.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/mufitomi.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/83825020329.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/kemamajadusujuk.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://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_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 21508 bytes
SHA-256: 29c9d782ccb760d43f1f4de80bc03860d20286c9452a139b6bd00bd361220ce6
font_02_sfnt_off00013209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13209 10464 bytes
SHA-256: ba95556ce06393c97b22c72d3e583de0f7b381e3a546bd50c79f945ea2858e3b

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