Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6e0eba93ae4f5c…

MALICIOUS

PDF

36.7 KB Created: 2021-05-24 12:59:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4f271bad14ec8c377ec0ff812332a995 SHA-1: 180cedaa93f6eccf0b4f3e804a38bafd4a82c872 SHA-256: cb6e0eba93ae4f5c42ccd383b97ac586ff556c07611c3761e28ede66a6897c6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically advertising "free Robux" and "game hacks" to entice users. The ML classifier also flagged the document as malicious. The embedded links likely lead to further malicious content or phishing pages, and the document body explicitly contains a call to action to access a "ROBLOX GENERATOR".

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-offers-game-hack In PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/minecraft-bedrock-edition-pc-free_GM479516143.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_off00003504.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3504 25048 bytes
SHA-256: 990c606de4287902d43296f9d4942bbbdb753029530781d0454dad2ec9c5ebbd
font_01_sfnt_off00006ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE7 18012 bytes
SHA-256: 2fb616bca13af88ff89276a9b2d2fcc075dc4ebb9507e4cf45ab0719cef726f6

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