Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54deb37b9d6e07c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-19 12:33:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 26b60fcd2920be7adfb8cfff023150c9 SHA-1: 4122ea671bb872d5114b48f458b527b04a268dfe SHA-256: b54deb37b9d6e07cec38660d3930c1ed622001a30fafdf706f8d05446ee78f82
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, specifically advertising game hacks and free in-game currency, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a game hack redirect lure. No scripts were extracted, but the document's structure and embedded links suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack PDF link annotation
    • http://condit-pack.com/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://condit-pack.com/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://condit-pack.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://condit-pack.com/images/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://condit-pack.com/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://condit-pack.com/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://condit-pack.com/images/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://condit-pack.com/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://condit-pack.com/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://condit-pack.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002de3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DE3 22964 bytes
SHA-256: 9cb55f708f5ad0569c963b657f2241332b24100b284bf3059d1a330ff1b976d1
font_01_sfnt_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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