Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a59c5ebb8be6520…

MALICIOUS

PDF

36.4 KB Created: 2021-05-20 16:26:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d0d45d3f37432fed5a84ae712f1b08a0 SHA-1: 1010ac1dfa5b16b090e1d483021227dcce647c50 SHA-256: 0a59c5ebb8be6520fc0d68056e715f8366d3ca97f2b8b5d075d653dbc5bfd36a
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 a password-protected-archive 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 0.9492

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-mods-download-free-game-hack PDF link annotation
    • http://apx-centre.ru/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/pubg-uc-jazz-cash_GM1330123889.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_off00003503.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3503 25004 bytes
SHA-256: f0fda0465e786c7d3c0036da9aa90976156397d52c3aa1de4e3605177b9cd073
font_01_sfnt_off00006d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 18292 bytes
SHA-256: cdbcc94192cea0c1a32d76b4e8648406db092070658ebd9590606dd52a123660

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