Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9ac51b1431720e…

MALICIOUS

PDF

49.3 KB Created: 2021-05-18 03:15:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f7b0cbfa20284ab435fd3208fc0e02dc SHA-1: 04c60eafd360c55693fa82aa9c82cd06adeebf6c SHA-256: 7c9ac51b1431720e10f082eb88a6a77f97459d7dacb8b103b1b9530b1775c44b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks. The document body, though partially corrupted, contains text related to 'Free Spins Coin Master Haktuts' and directs users to URLs that are flagged as malicious. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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-coin-master-haktuts-game-hack In PDF document text
    • http://selectionspdf.fr/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://selectionspdf.fr/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://selectionspdf.fr/images/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://selectionspdf.fr/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://selectionspdf.fr/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://selectionspdf.fr/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/robux-online_GM431946152.pdfIn PDF document text
    • http://selectionspdf.fr/images/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://selectionspdf.fr/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://selectionspdf.fr/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://selectionspdf.fr/images/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://selectionspdf.fr/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://selectionspdf.fr/images/free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487B 26024 bytes
SHA-256: 9135645773e7101ebab2970288844419d945a484a621c2e886ddbd76b13d44d6
font_01_sfnt_off000082b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off00009e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6C 18196 bytes
SHA-256: fd8ee59660af8c9e4664936919e7b5321f93298eaf8e2ea805d6f2ae56b4a3b6

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