Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0d39dcf40b2599…

MALICIOUS

PDF

37.3 KB Created: 2021-05-13 07:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ca955e01a48481eed0f303e1a2b8830b SHA-1: addf4ab66329f352f02290fa984bdb4780851f84 SHA-256: 1f0d39dcf40b2599b69d99d651b9ff192640052d19e2ca1732221e16293f9302
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a "hack coin master free spins" generator. The document body and heuristics indicate a lure designed to trick users into visiting a malicious URL. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0129

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/hack-coin-master-free-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_off00002f9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F9F 24312 bytes
SHA-256: de0eae665e4e3d5e3669fdf938b5797e3f697901f91db3d2b7e966f5de757596
font_01_sfnt_off00006714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 2880 bytes
SHA-256: 93b508a52e047ef4bff1d7d250d9aefd838e5a176ceb5e9be36ada0f8d333e07
font_02_sfnt_off00007102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7102 18056 bytes
SHA-256: f90826bfe2bc71c0265d319a9184b169c06436e7d3915f152a6a7ecd0e51099f

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