Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a5340599f50007…

MALICIOUS

PDF

50.5 KB Created: 2021-06-10 22:08:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ae4a2dc8f93b8f2d651b56f29e68f0c7 SHA-1: 6b39255c7ac980710eb4a8dd166e8187872afd9f SHA-256: 83a5340599f50007d0b09c841504f98e4a34049c6dfbf212f92c3c60a7837c30
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized slugs pointing to game-related topics like 'free robux' or 'coin master spins'. The primary external URI points to a URL that also suggests game hacking content. The document's structure and content indicate a likely attempt to trick users into visiting malicious sites or downloading further malware under the guise of game cheats or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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.tw/app/431946152/how-to-hack-roblox-on-computer-game-hack
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/pokemon-go-free-raid-passes-2021_GM1094591345.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/coinmaster-rewards_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/get-free-gold-cards-in-coin-master_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/coin-master-claim-free-spins_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/free-pushable-noob-models-in-roblox_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/coin-master-spins-2021_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/coin-master-hack-xyz-2021_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/coin-master-free-spins-gratis_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/robux-prices_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/free-robux-app_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/roblox-rewards_GM431946152.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/how-to-sue-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052e9.bin
fac4b88416fc03751c312e05ee2356ae09ee2ba253b223f7fe34e28741cf9eb7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E9 28352 bytes
font_01_sfnt_off00009359.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9359 5696 bytes
font_02_sfnt_off0000a06b.bin
35269c3e8ebc72af1fd967571bbe25121fbfe7b4fe873806a77f39a0049dee4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA06B 19024 bytes

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