Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2f6c80848588ab…

MALICIOUS

PDF

44.1 KB Created: 2021-05-10 16:34:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 64dd830f3db07c7758981f931ee45418 SHA-1: 23160267138ab7797e7e68ccdecc17657513b2c5 SHA-256: 8c2f6c80848588ab419a4b3193664fad949342e9a6ecb21d45c1c2b776f3edaf
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized lures for game hacks and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/coin-master-free-coins-link-2021-deutsch-game-hack PDF link annotation
    • http://repository.poliven.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-generator_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/youtube-how-to-get-free-robux_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004797.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4797 24148 bytes
SHA-256: 59b686e83a4100277d7ad2b68030ce0ada3275cfbc76d02b8669e525e7ad2eed
font_01_sfnt_off00007e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off00008889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8889 18756 bytes
SHA-256: cee569ad26c6995f0462545108d280bf76b2c9dfe620e2643f0a7a8ec4db527a

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