Malicious PDF — malware analysis report

Static analysis result for SHA-256 9546676b016a15f3…

MALICIOUS

PDF

84.9 KB Created: 2021-09-11 10:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 70c645ed06f6e62de08dd68717497806 SHA-1: bdbd3a37b4dbd0beea2816fb1a39710d8e0a59a1 SHA-256: 9546676b016a15f3c524b3e460789f974ba75d34e3cabcc58448f89bd02d0561
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=black+ops+4+blood+of+the+dead+easter+egg PDF link annotation
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/36940571535.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ronibajikazelaba.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/92980605651.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/91402091536.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/pokefun.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/gosoxu.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/27024998268.pdfIn PDF document text
    • http://quetthe.com/upload/files/65737312229.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/kufojaxaz.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/mowakinipumenumedutojepek.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/77677176497.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/76853913924.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/27505201974.pdfIn PDF document text
    • http://favourtec.com/attachment/file/47254002876.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/64553584872.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cff083db70f4d049e299d3e30af7c4df/56532813280.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/rivamovaselagusidemivoj.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/temufanojibuzoni.pdfIn PDF document text
    • http://airsoft1.ro/files/file/gefojama.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/5197352286.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/57444411196.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/57265276611.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE344 18636 bytes
SHA-256: 1ad2a845aa8a9bca9f8045c30f041e795c2008079344ba94f13723c17b8ccfb9
font_01_sfnt_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF2 11064 bytes
SHA-256: 6febc2712bfc038a069bd585a9f62fc4beec5fdec59fcb28f0076d3e7a95125b

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