Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5d63de35e802d6…

MALICIOUS

PDF

39.4 KB Created: 2021-05-22 09:29:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cfd0c27fbd9cac15f913995219a5164d SHA-1: bd36469f975e7ab45a88c29ef886b6eb75df5237 SHA-256: 0f5d63de35e802d63187d0b3f73996723623c2209014d6cd62d1a87a7d32dd0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with a "free generator / game hack" theme. The document body explicitly contains a "CLICK HERE TO ACCESS ROBLOX GENERATOR" call to action, reinforcing the phishing pretext. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/www-free-robux-game-hack In PDF document text
    • http://unilin21.ru/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/microsoft-free-robux_GM431946152.pdfIn 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_002_off00003383.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3383 25220 bytes
SHA-256: 704b4a4fe897f1e38fc51b76bbe81fe2b4ae62164f0d7e1033e5d909c9b3a59a
font_01_sfnt_off00006e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00007840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7840 18376 bytes
SHA-256: 3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a

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