Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6138c87a5941a9…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 10:19:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cd8079d8095ac6d6ebb0cb2887397341 SHA-1: 52f84ac659d666e951e49dae4ab45dae4b9a03b9 SHA-256: 8c6138c87a5941a990f27cf91a63b48a27135c091136505010f95dd3878b8956
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a visual call-to-action, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs point towards lures for in-game currency or cheats for popular games like Coin Master and Roblox.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-spins-and-coins-coin-master-2021-game-hack In PDF document text
    • http://unsere-beagles.de/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/wurst_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-robux-no-survey-or-human-verification_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_off00004806.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4806 24644 bytes
SHA-256: 2c54d38f61a46e3ea9ba517becd12093b49b3adcad70be834110d270b6aa536d
font_01_sfnt_off00008041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8041 18460 bytes
SHA-256: 9f443343d33dd80abfdfffa9dfb60a36fd2beaa647f06f075f3e145f27f8847c

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