Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dc5514f1fafbbd…

MALICIOUS

PDF

37.2 KB Created: 2021-05-18 00:31:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 25dfd9c61636beccdb5444c1b8c817de SHA-1: 45e4fd0f606248aeff197a9f8f197ab7c2e488ca SHA-256: d5dc5514f1fafbbdefe239f3cef31b1728da0db595d4ebd448ab90fb17fd4ac3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and text that lure the user with 'Free Spins For Coin Master Game' and a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action. These elements redirect to a known malicious URL, indicating a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-for-coin-master-game-game-hack In 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_off00003542.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3542 25604 bytes
SHA-256: c4f491b2fe4e9f53dd74395723db65154d69f2fe13a337eb88409e7b34b141cc
font_01_sfnt_off000070b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B7 18148 bytes
SHA-256: 3d9eadf91671033e4331a310c0b0805123b3ad5df85bc8ef5d318b7854ffa5cb

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