Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9e97407448e7ea…

MALICIOUS

PDF

83.4 KB Created: 2021-09-10 00:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0e50f3e9e69c39ce7ab0dfc17db06a70 SHA-1: d73e3ba7e5d7d8f3e9f13e21f7ae44c0ea1c1467 SHA-256: af9e97407448e7eaf5dc6e0655d1a15865576dc58e8289a9991f69ce080dcc1b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains heuristics indicating it's a link farm and attempts to lure the user into executing commands via the clipboard. While no scripts were extracted, the presence of a clipboard command lure suggests an attempt to trick the user into running arbitrary commands, likely to download and execute a second-stage payload. The document's structure and numerous external links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pleasanton.com/wysiwygfiles/file/xojorilududuxaxejogoxuzoj.pdf In PDF document text
    • http://zaiger.ru/img/file/87443639938.pdfIn PDF document text
    • http://aerotherminsulation.com/userfiles/file/wogoga.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/72080496314.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/zomojogapurane.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/73648370457.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/fikafuwekedutabatamilosad.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/limokizimonomin.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/ninarufok.pdfIn PDF document text
    • https://thehouseproduction.net/file/98850530275.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/wixaxofumijev.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/66678505507.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/17837604627.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4bbd39ece---75736483520.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/53590416906.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/312539569.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/biralafigojavo.pdfIn PDF document text
    • http://goldmustang.ru/files/files/19326454657.pdfIn PDF document text
    • http://swhos.com/upload/files/maparedoku.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/dubupum.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/80424338177.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/30237479533.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a49b2c456e---dusepixama.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/277034086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pokemon+emerald+rom+loveromsPDF 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_off0000dc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 10380 bytes
SHA-256: 94379ffec9ac37796a13fcf088ef72fe5aa897f336b40238da6519d4e5d73cc7
font_01_sfnt_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 19260 bytes
SHA-256: c195bca0d3af623f28fab830aa0faa6b3862cb6d2505f45d9e4a2750e36caad8
font_02_sfnt_off0001268f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1