Malicious PDF — malware analysis report

Static analysis result for SHA-256 56716a7a961bf722…

MALICIOUS

PDF

38.4 KB Created: 2021-05-16 06:09:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e048e9ddabb52f917941c531fc3daf3e SHA-1: af82b8ef9a469fd25553a6a48b1b5532539510ae SHA-256: 56716a7a961bf722ef6d33261d02c2a864be9a67ee3d1f153afbff0741427ac1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which links to a known malicious redirector. The embedded URL is used to trick users into visiting a site that likely hosts further malicious content or exploits. The document body text and heuristics strongly indicate a social engineering attempt to drive traffic to a malicious domain.

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-without-any-verification-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_off000036d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36D3 25544 bytes
SHA-256: bea9a0b8bf8f6fece24f2e838397efb69f3204af67fd0a8d6c1b54b15879c2e8
font_01_sfnt_off000071d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D0 19308 bytes
SHA-256: 301178d570ed694c8643ac68529098fd95120b57f2db1b64df12e7fbf37d492f

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