Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6b10dd60f710b9…

MALICIOUS

PDF

88.1 KB Created: 2021-08-14 16:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5de46aee9d743c8c5c7d3665ebf7bc40 SHA-1: b889b36cfeef68e7e74f0e660de539e9e0c55970 SHA-256: 8e6b10dd60f710b956d3eef16fd1bf2232b26dafd940fb2b415ff0ea2db2ce1f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and contains numerous links to compromised websites, many of which are hosted on WordPress upload directories. The heuristics indicate it functions as a link farm, likely intended to redirect users to malicious content, possibly disguised as an invoice or payment lure. While no scripts were extracted, the extensive use of compromised domains and the ML classifier's high confidence suggest a sophisticated phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/284fc9f1d89fe6c185bd51954f6d0a7f/93795249329.pdf In PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/50002155030.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/22ae7ffcd7e775424e06db709414f21e/fomat.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/rfs4bnqmssrvsocr7tiopnt344/13208356184.pdfIn PDF document text
    • http://a-pluset.com/userfiles/nogebamasutinarigoditov.pdfIn PDF document text
    • https://longhoang.vn/upload/files/xomiwadosajumozoroki.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/durorivobavowasofaziruda.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/95a96ei89r8sa3bum2e4o2qtnc/nedejejinawolikabadeno.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/magexeguzetawigosuxizema.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfee058acb---wavitaxotanu.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/votiruzajatu.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071821cd49f7---87162489373.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c79e48e5f9---69073731576.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/piluf.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/33134269864.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/a9918d0f430a7a84c20859583660f5bf/27381305952.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/zunumisapumadi.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bec92adb727---5210089832.pdfIn PDF document text
    • http://rheumatology.instituteupload/content/file/vajipigasekuvepotixo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dba7b9b43c---vupagiwitagoruj.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/43993220239.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/35180cd02985148eaf8db9bbdc63d946/semuxupojafonasevijitu.pdfIn PDF document text
    • https://hoalavender.net/upload/files/5419339080.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/forifisixogojufitetefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+police+scanner+apps+workPDF 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_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 17080 bytes
SHA-256: 586943a35c955b73da6139cc2c45a68bb6e6498de1afa0e48973770a1219c22d
font_01_sfnt_off000122a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB9 10436 bytes
SHA-256: 9427956fd9fd0200ff5bb421b0316b9ef46b2b9431b01422e87933f2e39be2e0

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