Malicious PDF — malware analysis report

Static analysis result for SHA-256 776151be21e44002…

MALICIOUS

PDF

63.6 KB Created: 2021-09-13 18:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d6b7332aeb5d5ddc7f5c4e07691070fd SHA-1: 1c1b1376c83271088e95692814baff4c5d57da07 SHA-256: 776151be21e4400224cc0eceb799c2ca61bb52052e3f8a9613d581b33bccd33a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, many of which are hosted on disposable domains and appear to be lures for game-related cheats or hacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7155

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 http://z-i-f.ru/userfiles/file/wereweboga.pdf In PDF document text
    • https://tp-pos.com/uploads/image/files/lukosur.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210907173100.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/60562070041.pdfIn PDF document text
    • https://greenways.at/userfiles/file/86802895590.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/40601843466.pdfIn PDF document text
    • http://clerus.hu/files/file/99405586115.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/66927779831.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/vevuroverugivuxo.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/78610900219.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/13018254079.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/fegep.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/3162220629.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/giborof.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pezunefeduwuxom.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/lowulezawuwabimivute.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f88b64cda9---35036376816.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/17583219873.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/70534099693.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/gonelag.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/3c19942c8a6d5ebd0d62447d4ebda7be/10200468867.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1613affc2999cb---fovixexarigiz.pdfIn PDF document text
    • http://itena.si/uporabnik/file/59443560180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pubg+mobile+mod+unlimited+moneyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E6 10516 bytes
SHA-256: f603e22cc29fa14d07dcc5935dbff3af8181546f153fdb8451c2beaf4e627f9a

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