Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a902de41c56b68…

MALICIOUS

PDF

43.0 KB Created: 2021-04-24 15:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a6a8858e00d3f37876982acee647409c SHA-1: 5e973b0f80c8ccd7146d4cd36540fec9dca84a94 SHA-256: f7a902de41c56b68158ba6033b64d74d933fed6687f6a895ef704c4b2ec8b31e
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free Robux and game hacks. The document body and heuristics indicate a clear intent to deceive users into clicking these links, which likely serve as a gateway to further malicious content or scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9836

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-without-survey-game-hack In PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-in-a-game-2021.pdfIn PDF document text
    • http://www.drent.se/images/roblox-hack-robux-download-ios.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-really-works-2021.pdfIn PDF document text
    • http://www.drent.se/images/admin-hack-roblox-dowload.pdfIn PDF document text
    • http://www.drent.se/images/como-tener-robux-gratis-facil-y-rapido-sin-hack.pdfIn PDF document text
    • http://www.drent.se/images/cheats-in-roblox-pet-simulator.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-gft-cards.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-no-email-or-human-verification.pdfIn PDF document text
    • http://www.drent.se/images/roblox-super-power-training-simulator-hack-2021.pdfIn PDF document text
    • http://www.drent.se/images/cute-free-outfits-roblox-girl.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41C9 25424 bytes
SHA-256: 8c5647c2f1606ef449325382d755fabc0d2bb592a0a46a47fe1a4feb0fb7eaee
font_01_sfnt_off00007aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8451 18896 bytes
SHA-256: b0c1a7c96aa264be318e1ab456a0b915a72e0bc05fcf36e1ad74b726c9d43bb5