Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f37945a1e44c339…

MALICIOUS

PDF

24.4 KB Created: 2021-05-20 03:48:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5b9275fbe7701dc18cabfcef369c5854 SHA-1: c9044bebda24fd9e7442f7f4c65767b31df374a7 SHA-256: 5f37945a1e44c339ce3be412dba3fa890c45a51ca4aca5bc6cbf14ae1bbb37a9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a known malicious domain, masquerading as a game hack generator. The document body also contains a call-to-action phrase, reinforcing the lure. While no scripts were extracted, the embedded links and the nature of the lure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0358

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/roblox-game-free-download-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
font_00_sfnt_off00000e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32 21492 bytes
SHA-256: b153d93f46b707c4f7468256618f7cc69e5b9a74167a6c2e7d43598e7e1374e8
font_01_sfnt_off00003d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D77 18336 bytes
SHA-256: 80ed343bab4622956636bda273ad70445bb095a29c144d947579647d7ea44a58

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