Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ffaef96a28e7ac…

MALICIOUS

PDF

37.7 KB Created: 2021-05-13 03:00:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 19837d42a25fcac2d06778bbb7613fbc SHA-1: 2bc1968cd73a771e2cd80eed468d9dec43c973a5 SHA-256: f1ffaef96a28e7ac51ee305e5b9eaa973d7e58a712c282779798b06cfb90a038
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious URL, masquerading as a 'free generator' or 'game hack'. This lure is intended to trick users into clicking the link, likely leading to the download of a second-stage payload. The document body and heuristics confirm the malicious redirector and the lure's nature.

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/431946152/how-to-get-free-robux-easy-hack-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_off000031db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DB 27344 bytes
SHA-256: 75ee771606cf27c03d791cc0ce0e558e5b6ee8b2ba0abfca2106e6ec251e3085
font_01_sfnt_off00007071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7071 18860 bytes
SHA-256: ae4481784f2b59baf7f887bcc8933de4398304efe668e0a39e1c63b4066a7356

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