Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bf91e0b2f1166d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 13:48:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b029fb2b41146e442426ed5b4d5d54ad SHA-1: 7b0e5f9f7ee413dcb54f5e78f9577546f328e723 SHA-256: 61bf91e0b2f1166de0e92440b9f839eed54a6e1e26fa4e524a3ff9deb9b10079
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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/406889139/https-iosgodscom-topic-20218flipmastercoinshack-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/ben-10-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-a-free-group-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/earn-free-robux-for-roblox-robloxwin_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robuxs-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-hack-2021-june_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-yin-vs-yang-ninja-assassin-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/where-to-buy-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/10-awesome-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-gold-cards-free-2021_GM406889139.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
stream_002_off000030cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CC 22308 bytes
SHA-256: fd7be468584be136d24e6da0376fcb8d178711065514001771eaad8233a539fc
font_01_sfnt_off00006207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6207 19628 bytes
SHA-256: ddef5dcbd34287e7c11d57da792f40b0674e615bb4601f5eb3c68c5e32a24415

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