Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e94174ac3dc394…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 07:36:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3cd3a277969d4c47c9382c2fe1d1a0a1 SHA-1: 2916c71875543274bf36770018148975105f382f SHA-256: 93e94174ac3dc39497e0e151171a43a4d3cae9b78c7164e7eceb94de21285a1f
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/431946152/free-hack-roblox-download-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/tiktok-free-open_GM835599320.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pokemon-go-free-evolution_GM1094591345.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-candy-roblox_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_off00002edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDD 21128 bytes
SHA-256: 5d7a781ac0e24a9d8c2facb473b10961acc2a3daeff7cea6ddef50911817b55f
font_01_sfnt_off00005caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAF 19140 bytes
SHA-256: a040137452719c15727ac866c7a239ddf57119fa7349b14eb85b3768af8ce718

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