Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee2840966ec7881…

MALICIOUS

PDF

84.5 KB Created: 2021-07-25 11:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f90182fad5067b9d96e78732ac9ff599 SHA-1: c450d4ad8b13ba3cab6f03dec5b3afc46849d4f3 SHA-256: 9ee2840966ec788182270affeed07fdc06d868228d38e00ea8da9606f7f7505b
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aartipalette.com/userfiles/file/73298976538.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00e6b693d---vawijukipozorovi.pdf
    • http://talk200.com/admin/admin/uploadfiles/file/suzogogawafu.pdf
    • https://agatanorek.com/files/file/22944982638.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/470f0801d4124ae151b87ed2c5bded12/visebidusuwivuxur.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/26614555268.pdf
    • http://tuanlongland.com/upload/files/pujirebuludomim.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983e912ca0d---9064203815.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/0u3rsvjsvov6q6kgcnn2fvhea4/jubise.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/b504cfbd0d68e155809fcaeb132243ca/xovavojuz.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0c76ee8a3c5e420a770fe422ead6d130/11777160847.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891cb6ed9e4---68166792715.pdf
    • https://lawina-radom.pl/files/file/93004421909.pdf
    • http://ilkyoukais.com/Images/Media/files/16666030849.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1e9737734---wagademofafore.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/afcccf973675d88911e13010a0a67f8a/8433960307.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xapetejiguxawogul.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0ff1db77c6495fec04933c717ea1b3c3/gotifipesafibumuxoniladef.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e1978b37066---90024685716.pdf
    • http://flomojapan.com/upload/files/33530897308.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d5491ffb7---tarenipavanitabokewesike.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eea2939e07---ledumodopikosefedural.pdf
    • http://musorcentrum.hu/files/article/file/bazofuliranosefepifapu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=is+adobe+xd+free+to+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de16.bin
717a9bf5e28d1fe26d628744ff456050211cba59388a655ee9cf09b18b051276
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 10536 bytes
font_01_sfnt_off0000f64d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 16792 bytes
font_02_sfnt_off00010e5f.bin
55d9719b4fdabd269f77d2a6c65836cca1e8ab8f15f102ed071f96f1867f494e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 21416 bytes