Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6291851b8b8972b…

MALICIOUS

PDF

36.5 KB Created: 2021-05-22 20:10:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 296207b361b947da4a0464defe0647f6 SHA-1: c03c1f9fdd97f4d1ee15da9cd06f3cb667f6f8bb SHA-256: d6291851b8b8972b62590103698c897d425fe562a51df5ac927018338f876507
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'free Robux' or 'game hacks' to entice users. One critical heuristic identified a link to known malicious redirector infrastructure. The document body and embedded artifacts suggest a lure for potentially unwanted or malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-gift-card-codes-2021-game-hack In PDF document text
    • https://academy.cr/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/pokemon-go-free-coins-no-human-verification_GM1094591345.pdfIn PDF document text
    • https://academy.cr/images/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/robloxbux-us-generator_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000329c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329C 24632 bytes
SHA-256: 619e1e36244c417fe8afa7284949295cc7eb8fa07372ac9dc43f2c99203eb8da
font_01_sfnt_off00006aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA0 19044 bytes
SHA-256: a83203ba6d4d8e4db234da74518c811315008a13a6a61ff598d06d89853e7c2b

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