Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ca9f7ca669f264…

MALICIOUS

PDF

33.9 KB Created: 2021-06-25 19:54:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2e330c97bdef7dda7eaa5a9c19d1ebf1 SHA-1: 15ea1f8a07b94355a437ce9218aea63d5bc31172 SHA-256: c9ca9f7ca669f2649fd15291402828313d8d669cbbf22f0ac9b86b0bb9504aed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with game-related hacks, indicating a phishing or scam attempt. The document body and embedded URLs suggest a campaign focused on distributing further malicious PDFs or potentially executing further stages. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/hacks-roblox-gamepas-game-hack In PDF document text
    • http://bgnails.nl/images/ben-ten-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-hacking-tool-prank_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-free-printables-party_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-rare-roblox-account_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-jailbreak-teleport-hack-download_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-assassin-how-to-get-free-knives_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-dominus-free-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-roblox-sun-glasses_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-hack-the-legendary-swords-rpg-roblox_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-strategy_GM406889139.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
font_00_sfnt_off00002e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E49 22080 bytes
SHA-256: 69cc7fdf32846e660a596fc901e12d2bb1f80fe460795678a0e87382f28b2593
font_01_sfnt_off00005f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0E 19092 bytes
SHA-256: 2ba076c8f87bf8e9310cab94c8c5b66042ec4e1ad1d3bd6e21a157a434e1b91f

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