Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6febb8dc83477c2…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 18:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3370ad1a25d89cca040dc2f11adf4df7 SHA-1: af7784575cd21f5c4eadc0b3212ada3c7e122d15 SHA-256: b6febb8dc83477c2a1fd55c123a03aa27606483c41b78a5abfed568c1f97bfda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a malicious redirector disguised as a game hack generator. The ML classifier strongly indicated maliciousness, and multiple heuristics fired for malicious redirector links and game hack lures. The document body, though partially corrupted, contains references to the malicious URL and other similar-looking PDF lures, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/coin-master-mod-game-hack In PDF document text
    • http://nonogos.com/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://nonogos.com/images/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://nonogos.com/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://nonogos.com/images/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://nonogos.com/images/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://nonogos.com/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://nonogos.com/images/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://nonogos.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://nonogos.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://nonogos.com/images/roblox-games-com-free_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E30 27328 bytes
SHA-256: 8cee5280d1df7e3d46c45354a404fc47dd9f98e8a699f5c4765aa89769ad3d26
font_01_sfnt_off00008ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE5 17720 bytes
SHA-256: e3dc30cd69473f08b9483bb660e9aeaccc8f6f74c3e4f353697525059d592d8d

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