Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b34701381f4ad8a…

MALICIOUS

PDF

70.3 KB Created: 2021-09-14 08:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ec986f20213eacfc7a83786cab6cc10b SHA-1: d582635018a2cf5209634032861f4941f56cac3d SHA-256: 6b34701381f4ad8a2ca9aedf86f658af88d2d11fddcb40e2dc2e071e4db970a9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3098

Heuristics 4

  • 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.
  • 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 http://okun.su/upload/file/65553388072.pdf In PDF document text
    • http://techcessgroups.com/userfiles/file/35253878562.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/wufozeka.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/21316694022.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feef0288fc---jijasuka.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/6223584836.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210902_11214EB51E5FEC3C.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210913_2AC430232ACA71AB.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/43276776815.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/wobutinuginipasel.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/79752968608.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/22056881860.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/89498422575.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/favasedakalu.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/77972682625.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/5483731747.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210909162551.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/92078404032.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613278a8b6f36---29958215289.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/721596830.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/bulivorepuzepazakawisaz.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vubigapenijemurusipuvad.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/46083096835.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/74171571124.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/xorolesekogoxowaliret.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/7747250277.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/63182907364.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/gifolidevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=oneplus+3t+best+custom+romPDF link annotation
    • 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_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 10720 bytes
SHA-256: 89e55f5488aaf66bbc0c19c6e239300a4fd7488fcdc6db541597f9acd727a6ad
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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