Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e44614972f0418…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 06:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a9c01c5e4d2cab8313c1fb1ba96aebe4 SHA-1: a17524b2b4552069854bd1f4b73ed6d38ae9c53e SHA-256: b1e44614972f04188df5b971f6319b8aff00aa7839c8dcba61d0452ab3250925
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free in-game items. The document body and embedded links suggest a phishing or scam attempt, likely to lead to a malicious download or exploit. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-robux-using-a-website-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/comment-hacker-des-personne-sur-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cheat-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/generateur-de-robux-cheat_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-account-hacking-device_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-punch-animation-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacking-method-for-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-richest-roblox-account-deleted_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/earn-free-robux-today_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
font_00_sfnt_off000030f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F9 22032 bytes
SHA-256: 57a23cdba6de27fbd7b5db31a7e75a1eb409ab094b5413d1272dfa2bb3fc0861
font_01_sfnt_off000061e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 19136 bytes
SHA-256: 404d587684b0976403cee0fb84f450fc49b722f472dbf3f4098a646d81b8179e

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