Malicious PDF — malware analysis report

Static analysis result for SHA-256 84aabc1d589209f8…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 00:15:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a8ef39a6e87675876cae0c43de199f7a SHA-1: 10074efa6fc237602c893e3aa986e5112a4d83f8 SHA-256: 84aabc1d589209f88a2a0e43aff2fbb67bb134eab8fbdd22f9b894f150c85a50
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related hacks and cheats. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to distribute potentially harmful files. The document likely serves as a lure to download a second-stage payload.

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.co/app/431946152/free-builders-club-roblox-2021-game-hack
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-cards-live_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-spin-coin-master-2021_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/hack-coin-master-online_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/hack-coin-master-free-spins_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/can-you-really-hack-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-redeem-codes-2021_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/download-coin-master-apk-hacked_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-pet-food-for-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/roblox-hack-site_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/hack-coin-master-game-apk_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-hack-download_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-no-survey_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002de5.bin
98ed4806887e70011dd4db9bf63f2ba8f4db3d99a9bcc823fa12b4e4bd44fb72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE5 22072 bytes
font_01_sfnt_off00005efe.bin
80bf239416a4807af639d600481cd6d17a763c394bb6b3017659fbf11c097d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFE 19488 bytes

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