Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e25edf66c9bad15…

MALICIOUS

PDF

38.5 KB Created: 2021-05-19 12:10:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 207089f2631d5e72db0a9ef2e02aa252 SHA-1: 6fa3caf3e0130c89ac7507f4dcb17350cfe1ef8a SHA-256: 9e25edf66c9bad15324a2eb9450f6667b6f28de75ef03a31eb2e35f3799b3e1f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses an MFA/2FA-themed 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 0.9934

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/1330123889/pubg-uc-2021-game-hack PDF link annotation
    • http://heilzentrum-ulm.de/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-real_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_off00003d08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D08 24800 bytes
SHA-256: 2bd5a0ccda10a7447f87ec6c4db768e6fda3ae3509b45bd86c8ec6e4056bc632
font_01_sfnt_off0000744e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 18300 bytes
SHA-256: 792744c9184ca8e67024c25d81bb790eba3106c699a66d4813878fab3c321418

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