Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6eb75ae44e2762…

MALICIOUS

PDF

42.6 KB Created: 2021-05-19 10:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2bba0b5125bef6b27419d0e6068beab5 SHA-1: 2b48c2677e9924a0388b86b2771a789be2cf3f8f SHA-256: 1b6eb75ae44e2762ae27e82101e18d126b228d7273c5a798222128323c82591b
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 0.9971

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-hacks-for-free-spins-game-hack PDF link annotation
    • http://ernstgloves.co.il/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-spin-and-coin-links_GM406889139.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
stream_003_off00004c2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2E 25092 bytes
SHA-256: 3c47031e0b9a183d70bc5ad4188f61b0990c196d36e75d705faee89a831a97e7
font_01_sfnt_off00008524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8524 18056 bytes
SHA-256: 12d79a7ddbb75c7a0854102822057d5441bee2ca4a20c79f8211a3d0b9a1f375

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