Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f6f110fc2286fe…

MALICIOUS

PDF

36.7 KB Created: 2021-05-24 12:50:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cf4ab2fd414e91e1238a2b0b426a7c8c SHA-1: 3428d1cef2056fa9d04241f1fd6decdcfc4b658c SHA-256: f2f6f110fc2286fe4dc9bc813b62453bd48f493f459f1f6057b075408314f779
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, masquerading as game hacks or generators, which are likely intended to lead the user to download malicious content. The ML classifier also flagged this PDF with high confidence. The document body and embedded artifacts do not contain executable scripts, but the presence of multiple malicious links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/how-to-hack-a-roblox-account-easy-game-hack In PDF document text
    • http://gomelavto.by/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/level-coin_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-coin-master-cards_GM406889139.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_002_off000030f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F2 26020 bytes
SHA-256: 94a1c1fbbd0664e0cf18453cfac01999926d3d00205fa2c9fca7a4a68c637c46
font_01_sfnt_off00006c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C42 18772 bytes
SHA-256: f0aa2a8f008262e8aa636f08cdffff7c9568ae6e0bf5f389be1472b9a6879674

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