Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c344e0d0389605…

MALICIOUS

PDF

38.0 KB Created: 2021-05-10 12:35:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 774d2e134b71304601c9844159d45923 SHA-1: 1390d16cd975c1b3f5d6618da6afeaec32d333d7 SHA-256: f1c344e0d0389605e8f4d8d532ff8a285bb4a756855d73a98e675ee9ced5c063
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded artifacts suggest a lure for free spins or game hacks, which is a common phishing tactic. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a redirection to a potentially malicious site designed to trick users into clicking through.

Machine Learning

  • Nyx PDF Classifier clean score 0.0126

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/406889139/100-free-spins-coin-master-2021-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_off000032b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B3 23908 bytes
SHA-256: fe0bda3866656058f95527c048971cec9ca1815a573d3ba7801ce9b4a6d17a49
font_01_sfnt_off000068f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F2 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000072a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A4 18288 bytes
SHA-256: 1939309b77caa829624372287fe10a2616c3651aa75093da2eb3072b6f3a4d5c

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