Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c76fbc8bf777e49…

MALICIOUS

PDF

65.2 KB Created: 2021-09-18 23:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 07c3566d8877e0e1789acb0fe9167cca SHA-1: ca9033e3802ce849a24614448b8fd0a1d38533e1 SHA-256: 0c76fbc8bf777e490cfa6a0200b66fbe7d9a5a553ce45c88428c2b24bc96e80d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, strongly suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6385

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://laborke.ru/uplcv?utm_term=how+to+hack+snapchat+pictures PDF link annotation
    • http://bodemveenweiden.nl/bodem-veenweiden-img/navoxikujesokexaseguzupe.pdfIn PDF document text
    • http://vit-physio.de/file/72160273208.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/nibolaju.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/54713048562.pdfIn PDF document text
    • http://standardamulet.com/files/files/9137401724.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/63474923465.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/turoti.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/42509093592.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/pedenikamibajilepuda.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/86856498404.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/rokibidi.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/12633255198.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614136fdf3f4d---fatumakironupefe.pdfIn PDF document text
    • http://taigesw.com/upload/files/vimamusasivizoxibilikiv.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451a168e8b5---62839613623.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/lupoju.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/10799112698.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/46101775797.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/zepafudagerutaropijaj.pdfIn PDF document text
    • http://balone.net/_upload/file///84785419722.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/pifokadujazojefusoz.pdfIn PDF document text
    • https://mcsfood.com/images/file/60556532140.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/8017829297.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 10692 bytes
SHA-256: c0a90333bb4669b942d13f1b7a20b18bcc25d76fce3eff62f6680151bc8ca21c