Malicious PDF — malware analysis report

Static analysis result for SHA-256 919a0a7d4fed788a…

MALICIOUS

PDF

37.0 KB Created: 2021-05-20 23:14:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d005e8b98fb6b9f2bf8536464fffbaa2 SHA-1: 20936fa6ca856370536e9826ed9ecb9bdf76172d SHA-256: 919a0a7d4fed788a4e4dcdf91cf1a54b51d8572c746be46976b2f155ea893e8b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action related to 'game hacks' and 'free generators'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a deceptive lure. The document body text and extracted URLs reinforce this, pointing towards a phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/how-to-make-clothes-on-roblox-for-free-game-hack PDF link annotation
    • https://omhelsjehart.nu/images/www-rubux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-viking-quest-hack_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_off000031a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A3 25980 bytes
SHA-256: 8512b04b92bcf7aff263976013cc9116dc25b8ab17ec65da41bd442310dbe6c6
font_01_sfnt_off00006d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 18976 bytes
SHA-256: b61b86c25d6115ff697aefd9ab641b9f071fd28e07f949dfa38bf6f9b5f40050

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