Malicious PDF — malware analysis report

Static analysis result for SHA-256 376f4ad60dda7598…

MALICIOUS

PDF

45.9 KB Created: 2021-05-16 08:27:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a7ecb4906b607716deb5d0726e3135c7 SHA-1: f17a45cd9bc9435d965bb55c5fade89cabad7d4b SHA-256: 376f4ad60dda759811818ed2e3d3464c6bb6c150aca1353301c0eea406456f6f
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 0.9432

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/coun-master-game-hack PDF link annotation
    • http://laboraltoledo.com/images/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/wurst-18_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/minecraft-pe-free-download-ios_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004783.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4783 29880 bytes
SHA-256: e90171c3dada63d76c8de31304e8605d178b4887fdf12044efbe86fe47b6c20c
font_01_sfnt_off00008914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8914 2928 bytes
SHA-256: 64242521e32848fe2434190b0c7414fcd492221a3cc2972c66f57f4842775e11
font_02_sfnt_off00009331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9331 17564 bytes
SHA-256: 72d3b261735c458e188b77d9265bda43ec201c960effeb64df7e0d177a71086c

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