Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f412a175513b2d…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 23:37:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 97a214134df8433e0702fd1e623e2d2d SHA-1: ca055f81b32bc01d458b3d6b249fd691715b73b1 SHA-256: f8f412a175513b2d64dffb60bd34fcf039c9f3cbeb5897f149f622fd42421a51
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 0.9796

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 https://netcdn.online/app/431946152/how-to-get-free-robux-not-a-scam-game-hack PDF link annotation
    • http://www.opac.stieimalang.ac.id/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F9 25140 bytes
SHA-256: bac368d6687bd777bed2f3951a93ad7a4702e6b6e22ae17a7d40b871da0ead40
font_01_sfnt_off00008b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B36 4008 bytes
SHA-256: 982b414f0c1a2f334cbcfa74b37c63e373061dba1812816e371faa6e65399a16
font_02_sfnt_off000098c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98C5 18768 bytes
SHA-256: 022361ef70d0601eb321de045a15355e0ef134abc2a3262f50e5e6000d82738d

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