Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88cfe9b072c8967…

MALICIOUS

PDF

40.7 KB Created: 2021-05-23 15:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2c45da933d8c7e6d7989324c90654e54 SHA-1: 669611d6046aac275a3601f2fbf27d2741362b1c SHA-256: a88cfe9b072c896795c1453688531a7ca510f594e71bdbaafe56341102084103
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7508

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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://netcdn.xyz/app/479516143/minecraft-windows-10-hacked-client-game-hack PDF link annotation
    • http://pesok-rk.ru/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_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
stream_002_off00003743.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3743 25896 bytes
SHA-256: af92ac9258d47c7164221fcd92c7a3461dfdde0a7ccf380fa08941c4fbb4420f
font_01_sfnt_off00007223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00007c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0C 18768 bytes
SHA-256: f9a71ab68452ae4ccd094805e59123059ba28481ac44c73a337d9a6d18fc1d00

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