Malicious PDF — malware analysis report

Static analysis result for SHA-256 4175204aa9da33fb…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 23:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 866e3b3a07f34dbc6d2aba49dfaaa55a SHA-1: 01f3612b6be463cf34ebf3adc8f9e62011198811 SHA-256: 4175204aa9da33fb863d737149e4af6e3cad9c0b8135aa96844e3efb55316259
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple links to known malicious redirectors, specifically advertising 'Roblox Cheat' and 'game hack' generators. The document body and heuristics indicate a lure designed to trick users into clicking these links, which is consistent with phishing or social engineering tactics. The presence of a callback lure suggests a potential for further engagement or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/roblox-cheat-game-hack In PDF document text
    • http://mohacad.hu/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-top_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/robux-generator-no-human-verification-2021_GM431946152.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_003_off00004954.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4954 25004 bytes
SHA-256: 2fab4cc1116447bfc34bafc14745a10868e00e7f0801e3b3215bc7b9119afb6c
font_01_sfnt_off0000838a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x838A 18280 bytes
SHA-256: 98eeb43752f52f60f387912f8d519d04d2eb9110f2a162fc7878abe7cd109578

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