Malicious PDF — malware analysis report

Static analysis result for SHA-256 03eeabca09630dd6…

MALICIOUS

PDF

100.3 KB Created: 2021-08-11 18:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 749f0d54212316fc063fb0b976723411 SHA-1: 595ec624043fd8adc6a0d2a1457a60296522ff0a SHA-256: 03eeabca09630dd617a234fbc837686cec6b43936f55f6566676e898297ef92b
156 Risk Score

Malware Insights

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

The file was identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is unreadable, but the presence of numerous links suggests an attempt to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://studiolegalezullo.eu/userfiles/files/7281872733.pdf In PDF document text
    • https://activepymes.com/pub/file/kanimedoxeganivare.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/vigodavemetusifadazu.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/zaraxag.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/vugukofamobiv.pdfIn PDF document text
    • https://atl-50.com/files/file/mifigoni.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/429ae1c7664248d3578115fc59af4e21/87923374127.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/88711627529.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/91017444288.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/1070173135.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/97709751017.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/rbijikvl0hrlfggugsek7dgbid/lodojivaximinimaxebixo.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/widofesapixox.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd27407577---mivenitedodu.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9fa96c9b8---batadepolujep.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/43429158863.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085861e762e0---514862051.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/ximogagup.pdfIn PDF document text
    • https://sinarwaja.com/account/files/39277725642.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/77526078876.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/40875838810.pdfIn PDF document text
    • https://nattasampun.com/upload/files/firozexe.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/j0bfhck1kpsrct5vcpatrphipr/samuwuviterut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=se%C3%B1ala+la+clasificacion+del+genero+narrativoPDF link annotation
    • 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_off00011fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 11000 bytes
SHA-256: 3be533f60d395fe501f92aa8e245ac81120ede25b97cd426a6ffd131623966fe
font_01_sfnt_off00013920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13920 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15132 19188 bytes
SHA-256: cb62c48ae9251dcde61b22e5faee5677ca76fc86693849a494a6364554762aa5