Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4d4fd063926e07…

MALICIOUS

PDF

38.4 KB Created: 2021-05-12 05:40:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 05fa4d6839b4c9b4d1b9593955845a3b SHA-1: e3d0db8eb76df878216815fe00db39143ba05553 SHA-256: 2d4d4fd063926e077eb55a41907a434ba1ae618e2686fd7d75bd21b730de9701
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically leading to a "free generator / game hack" lure. The document body also contains text and a button-like element encouraging the user to click a link to download something. The primary malicious URL identified is https://netcdn.xyz/app/406889139/haktuts-coin-master-spins-game-hack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/haktuts-coin-master-spins-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32FA 24560 bytes
SHA-256: ef9de3a5d69df13420b9c5cdaa16ce4008286ee6c6c2ae78ae933b2c7155e2ba
font_01_sfnt_off00006b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9D 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off0000753e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753E 18032 bytes
SHA-256: 2edc1e5dcfc1cbec7c7d12fe70182b6d2b6a9b98aedc5ae1785bec4f7566d2fe

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