Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e0fc2e8d64f66e…

MALICIOUS

PDF

40.9 KB Created: 2021-05-14 18:02:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 08b10b1ffbb30436a0e3c09f6f3cea05 SHA-1: 3179d537cb0f656bf75334671dafdb03f799ea55 SHA-256: 61e0fc2e8d64f66e0bb829728ff5855b935f0b3f37f751a91cc5e23d5e0d69fa
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body and metadata also reference this lure. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a phishing attempt designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/who-to-get-free-robux-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_off00003772.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3772 26016 bytes
SHA-256: c8aae08ebb1580b250c838ca43e95adca29e724cd85e684f2198635a63b72625
font_01_sfnt_off000070db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DB 3928 bytes
SHA-256: 8621c8d502ef3782778d9f8a6275bb869c86817d512651ca4fd19fb1e249c467
font_02_sfnt_off00007dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 18484 bytes
SHA-256: 7ba6f7de64c6d8ae6f5469fb20d9bd46bb355649f5c0a9ce8a2cee34149577d7

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