Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad795e9a6b0cbe1…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 11:13:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df2f36cf95df4cb95123e8ba46e5b069 SHA-1: 2144e46b14bf35b7a556896ae5372aa439a6620b SHA-256: bad795e9a6b0cbe175027a7ae953a69af50a82712363d21d78dafd16b822467b
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 0.9832

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 https://netcdn.online/app/431946152/roblox-com-games-referrer-roblox-player-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-4l-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5120 29092 bytes
SHA-256: 94cb1e208cefd7fd5a130dd87b6e91240a7d7808d425785fba02632feff62ca6
font_01_sfnt_off000091ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FF 18608 bytes
SHA-256: fe127bfd5ab6a4b2b53b099a15c551b8e40bc135ed62b4e782cd2911e4f76f6e

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