Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a0ea7edc0966dd…

MALICIOUS

PDF

41.5 KB Created: 2021-05-19 15:56:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 071c7fce311a8c1caefaf5f469bd042a SHA-1: a92c42c9377433ca943e4d6fc8265824e8e7436c SHA-256: a2a0ea7edc0966ddfe98da605132d335ebd4d3c2e22ce54debce66bce6d20c0f
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 0.9971

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.xyz/app/479516143/minecraft-hacks-wurst-game-hack PDF link annotation
    • http://bernd-voehringer.de/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://bernd-voehringer.de/images/rbx-free_GM431946152.pdfIn PDF document text
    • http://bernd-voehringer.de/images/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://bernd-voehringer.de/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://bernd-voehringer.de/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://bernd-voehringer.de/images/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://bernd-voehringer.de/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://bernd-voehringer.de/images/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://bernd-voehringer.de/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://bernd-voehringer.de/images/free-things-on-roblox_GM431946152.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_003_off000047fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FB 25212 bytes
SHA-256: 98f32acb370f082af20839ed3cc87ba4be021baa8d1d9ff8876b7f9b0dada770
font_01_sfnt_off00008092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8092 18076 bytes
SHA-256: 3e7497e6bc4bf84e5186ee2c608eda5b15e7e8e7c6854cdd6eb66a0ec10d8832

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