Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2706bdfd02c2467…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 21:33:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6411c945b7c8caeeb7873184195644d4 SHA-1: f04b822d21fe02e4685768e3b9e9e2b426b3c706 SHA-256: a2706bdfd02c24675daf88088179ab7954dd52fcc6c26c092f5ff49006ec5a9f
142 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. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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 http://netcdn.tw/app/406889139/how-to-hack-coin-master-spin-in-hindi-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-gift-card-no-scam_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-online-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-we-hack-com-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-cheat-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-roblox-com-games-for-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/games-on-roblox-that-allow-free-song-id_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-how-to-get-clothes-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacks-to-get-money-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/tiktok-free-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-codes-2021-september_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-free-item-source-code_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-offsale-stuff-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-followers-on-tiktok-without-verification_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-promocodes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/dragon-ball-super-2-hacks-roblox-2021_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_off00002e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0A 21784 bytes
SHA-256: 74dad9edc53e25eaf6d5423764dda5fcf213384a238460f2726f65fe314b9af7
font_01_sfnt_off00005e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E40 18520 bytes
SHA-256: a858dd88c372e08a0f3d9237032407f953de1c9476e9d76775859c952356f15c

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