Malicious PDF — malware analysis report

Static analysis result for SHA-256 868e93854dac7745…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 12:28:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 375169cb991e8d0e59196f560adc2a6e SHA-1: 3ee1c95f7e84de8787bec0addbbd872fd4961d6a SHA-256: 868e93854dac7745ee74003ea356c19026ecebcf2129c28846dc976da10bfa98
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/479516143/minecraft-diamond-finder-hack-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/installer-roblox-hacker-sur-pc_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-mod-apk-hack_GM406889139.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_004_off00005549.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5549 27364 bytes
SHA-256: 93fcc4814750ce97aae2555f1f549d99fe03c04c20a72f808937bdb03875f9db
font_01_sfnt_off000092d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D0 18484 bytes
SHA-256: 265962787b73e694aac7c67ed987488fc8d8021a4c66c1127c37ccae154b779c

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