Malicious PDF — malware analysis report

Static analysis result for SHA-256 383ca160d6874588…

MALICIOUS

PDF

39.4 KB Created: 2021-05-10 23:33:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 60bd63850f55a665060f8407b09c1a0e SHA-1: 98417aa95f6946ffb5985da4807ecfdcd681f47f SHA-256: 383ca160d68745888d760192940471f43f089a6f087aa58382f45d8f4a8d31e0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple critical heuristic firings indicating it links to malicious redirector infrastructure, specifically promoting a 'free Robux' generator hack. The document body and embedded URLs reinforce this theme, directing users to a URL associated with malicious activity. While no scripts were extracted, the PDF's structure and content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-win-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000031d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D0 25868 bytes
SHA-256: 0c333ab9b02b40a41cd81fd51142bb3cb0e4feb25379e4a8f3c9cbe53070fe07
font_01_sfnt_off00006e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1B 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000077cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CC 18496 bytes
SHA-256: e7fadbffdbea7672d80b62dbce00c4cb5a3018b55a4b8226d615899545ab846e

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