Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab93a2e6366c174e…

MALICIOUS

PDF

33.4 KB Created: 2021-07-08 01:47:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6388ec1718c373196a69f59428d96f39 SHA-1: 74b76bbdbe0752c2fc5d104e2764814ac17c81f9 SHA-256: ab93a2e6366c174eb1604ffc3a2d6e73813e7098fa5cfdbb29d498fc517ee8dd
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that link to sites offering game hacks and cheats, such as 'roblox-hack-me-game-hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to distribute malicious content. The ML classifier strongly flags this PDF as malicious, and the presence of download-related lures reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-hack-me-game-hack PDF link annotation
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-20212021202120212021202120212021202120212021202120219-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/system48-roblox-hack_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-on-roblox-without-builders-club_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/robux-cheat-org_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-giver-no-survey_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-jailbreak-money-hack-check-cashed_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-virus-free-hack-clients_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/box-land-free-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/cool-robux-hacks-lol_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-dinosaur-simulator-free_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-long-can-you-get-banned-for-hacking-in-roblox_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_off00002f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F89 21312 bytes
SHA-256: 9f48f33ffd68f4b1111492d0f0f57cd36f57970ef0d531fe80032cb9b5219d06
font_01_sfnt_off00005de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE1 18852 bytes
SHA-256: ae5bbd1016d3eca5969145279625dbf0af4bdaae54505d1f649a6545bf5fde29

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