Malicious PDF — malware analysis report

Static analysis result for SHA-256 56efcf4f3007835d…

MALICIOUS

PDF

49.5 KB Created: 2021-06-03 09:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0bca58826853f37f92335ca5af2697c0 SHA-1: f0dcc8f16a14f5a8c885716b660f71dbd785cc5c SHA-256: 56efcf4f3007835d6bb5b2aa76034e8a245dabe400f9393b6d437781bfe84349
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and hosts further malicious PDFs, all disguised as game hacks or generators. The document body and embedded URLs indicate a lure for free game currency or cheats, which is a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/apk-coin-master-hack-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/i-need-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/mathep_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-u-scamm-people-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ee8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE8 24676 bytes
SHA-256: 97531450d2d3581909ae08dcd83a35ac0a0ae03578f8546b723405eb602a9b67
font_01_sfnt_off000087ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off0000956b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x956B 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5B 17892 bytes
SHA-256: 10848dcb94fa8ef52647dff51f313a82fe0a75c442c4a6ae41e72789ca7f1d9e

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