Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3e4d077327aa96…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 05:04:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d7a38b419c1e516c2b35ab3c575d1869 SHA-1: 268a460217b405ae47bb52d5d5f05bf6d967edde SHA-256: 0f3e4d077327aa961cd08815185bf813b1c4300de124d8dca4a06b0d90e8fc53
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appear to be game hack generators, but which redirect to malicious infrastructure. The document body and embedded links suggest a scam related to free game currency or spins. While no scripts were directly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://netcdn.xyz/app/406889139/coin-master-fun-free-spins-game-hack In PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/woman-roblox_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/games-on-roblox-that-give-you-free-robux_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_off00004bd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD3 24304 bytes
SHA-256: 10c96e0ad17c824917456960320118bdc28d7ea5f86d906affc6b2df729c00f2
font_01_sfnt_off0000835e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835E 18028 bytes
SHA-256: b886d19e0857ddff44b85450f57c8c2707e7243da381be74ba2c44e7741ea293

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