Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef0bb91c76cd853…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 11:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7450334688e40288f6c30f4e3fde6bfc SHA-1: b4768165db8d66451b3aadea7067adf6f1262ad9 SHA-256: 3ef0bb91c76cd853d989f310c5dc89aa4a2f09b78bfd7d307ee07dea4b323aa9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users to external sites, including a known malicious redirector. The document body and heuristics indicate a scam related to game hacks and free currency. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for further malicious actions, such as downloading additional payloads or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/free-coins-and-spins-for-coin-master-game-hack In PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005242.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5242 27108 bytes
SHA-256: 9312e7eccef6dae3c532ce4a58f3493d0709c7b70bf10b0f664d75e3eef53e11
font_01_sfnt_off0000905c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905C 2988 bytes
SHA-256: da4886ec5dc566369d1be5e4781e14c60128d9e7ce4dadb1e4ec21a956fe0d80
font_02_sfnt_off00009ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB5 18060 bytes
SHA-256: f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120

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