Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0bc259392045e9…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 07:39:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a874950bf869a9aac0f7b6153f0301a8 SHA-1: 3f789f8ca1eea6ef4678b8e8625f60ddcbf7a32e SHA-256: 9c0bc259392045e98b6bece1e3634c737f3b3089963e61c84ca781247836a0fe
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 0.9507

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-hack-no-survey-2021-game-hack PDF link annotation
    • http://ce-tsv-nantes.fr/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/roblox-robux-generator-http-freerobuxgenerator-xyz_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_off00004b68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B68 25000 bytes
SHA-256: 5d2c962bc7b6c5c5166f438234547726b64629a647eb6a13edb5ebac98779b92
font_01_sfnt_off00008505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8505 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB7 18552 bytes
SHA-256: 08b93b8e79f8f8fdf66b2b731fa8b5bfc2f7a48790bf7a909dc60fe86eb0a381

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