Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac86a7484f2e27f…

MALICIOUS

PDF

45.6 KB Created: 2021-06-04 00:05:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52076568494c5ce212fd931c49c0dd88 SHA-1: d72dd118fd9502bd0ea97cf1f67a15dace8f8359 SHA-256: fac86a7484f2e27f4c8595af4abe74dec9e39e369027785c1c7bddaf0611259f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 0.9864

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/1330123889/pubg-uc-hack-xda-game-hack PDF link annotation
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-free-version-pc_GM479516143.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_004_off00004d8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D8C 29752 bytes
SHA-256: b5edd014ed1970933823ca04cb86c8cfe0b7edf6ac4a3bc52cb985125d928833
font_01_sfnt_off00008e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E42 18700 bytes
SHA-256: 15f22126732e30ec553c6e87cd499c2c2b49c61dc2e3e635caaa8b3fb234e816

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