Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2e948b61f71d4e…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 16:46:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a46ead2ffbb9539843adc929d920595 SHA-1: af3a423f84b63b92620b05ee886c45bb5a37b04b SHA-256: 8f2e948b61f71d4ebdc07b801495562c0f90668cb7defc4db5eb071e91fc2af1
220 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a lure for game hacks, specifically mentioning 'free tokens in Minecraft'. The document body reinforces this by containing similar URLs and text. The primary malicious URL identified is http://netcdn.tw/app/479516143/how-to-get-free-tokens-in-minecraft-ps4-game-hack, which is likely used to distribute further malicious content.

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.tw/app/479516143/how-to-get-free-tokens-in-minecraft-ps4-game-hack In PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/has-roblox-always-been-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/legit-free-robux-websites_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-800-robux-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/cheat-in-roblox-jailbreak-glitches_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-synapse-x-key-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/cheat-roblox-obby_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-an-invisable-head-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-hack-infinity-rpg-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-how-to-vget-a-free-lambo_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-clothes-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/robux-foxy-cheats_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-roblox-help_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_off000034c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C4 22716 bytes
SHA-256: ead45c071d28f38582b0d4502fe5682366c52d79718c1d37703c9c82457ff8bb
font_01_sfnt_off00006772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 18548 bytes
SHA-256: c9fbc10abf9748535dcf6f38893f5f1d2b6f185faf9d47973b5cce24443c5ca9

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