Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12db1db9a11d118…

MALICIOUS

PDF

52.8 KB Created: 2021-05-19 09:00:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 70b2382942ef89bcd728ca720c953a75 SHA-1: a97fc62506ac1183ac5b623e38724dba39b1b781 SHA-256: a12db1db9a11d1180759e17bdbd9cb05812c85d83514e88d2b578eb4ab093ae4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a prominent URL in its body text, all directing users towards websites promising free game currency or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a coordinated effort to drive traffic to potentially malicious or scam-related sites. While no scripts were extracted, the document's structure and content strongly imply a phishing or scam lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9324

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-gift-card-game-hack
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/cheats-coin-master-free-spins-and-news_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/www-coin-master-hack-com_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-hack-link-2021_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/minecraft-windows-10-code-free_GM479516143.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/minecraft-survival-hacks_GM479516143.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/get-gold-coin-master-village-hack_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/hacks-for-minecraft-windows-10_GM479516143.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-spins-coin-master-cheat_GM406889139.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/add-robux_GM431946152.pdf
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005041.bin
e72ee2e7be06d90f97892ace563c339ed3b4737d8a0c61fad3e59d4b19d6561f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5041 27068 bytes
font_01_sfnt_off00008ec4.bin
ddfd86c88a6b8304bc31eeb9f28c8110fac325cdacc87503bacf4ac741777490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC4 8704 bytes
font_02_sfnt_off0000ab2e.bin
59f1432744b9d8cf879cb7c8a299bbbbba85d5427cd565107f85277265ec050e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2E 18640 bytes

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