Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d22960e2c2bd00a…

MALICIOUS

PDF

36.3 KB Created: 2021-05-10 11:41:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a90db9a149eee09af22d67bdf3a13c7d SHA-1: cca7a863473713a03bb807cab039ed14d5a939bb SHA-256: 0d22960e2c2bd00ad6bb9e97eb47579ac77005b2c3aa079d362eed20ae173b68
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL leads to a known malicious redirector infrastructure. The document body, though partially garbled, contains text related to 'Free Robux No Survey' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. The primary IOC is the malicious URL used in the redirection chain.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/free-robux-no-survey-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_off000032f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F2 24944 bytes
SHA-256: dddc927b2ea99cfc57ad70cf96a8d7294b19cc5cda3f8ed296130b5ee4062d2d
font_01_sfnt_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 18308 bytes
SHA-256: d3a10f634c5ecc3d7353c949fdf4d39280fe41fff4e373acd575ae0d5bea3c9d

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