Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2f0d0fea280493…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 13:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: db69df9df88af55a41741035f6067679 SHA-1: 37a085cd099eadb752d4606728d4a4e7dceecfdb SHA-256: 9e2f0d0fea280493cf16d5dcfa3e281848151b9ec9d19f02bfbc531ca9c225bf
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game-related content to trick users into clicking malicious links. The document body and heuristics indicate a redirection chain leading to various SEO-optimized PDF files, likely designed to host further malicious content or phishing pages. No scripts were extracted, but the presence of embedded URLs and the redirection pattern strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/how-to-get-free-stuff-on-roblox-gear-game-hack In PDF document text
    • http://bgnails.nl/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/gratis-hack-royale-high-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/hoto-get-free-robux-works-100-no-human-no-survey_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/top-ten-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-cool-hair-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-hack-tool-download-free_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/cash-for-apps-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/free-working-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/pastebin-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/naruto-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDB 23236 bytes
SHA-256: 096e0fef8081d4fac5204319fbfc348586aa78a807d2d006f46218c9ac54da67
font_01_sfnt_off00006443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 19056 bytes
SHA-256: 9347707fb7d35bcf162ce50371d8dcf5775ffb6dd30597265fcd570088ac677b

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