Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6066c8f7c9fd3d…

MALICIOUS

PDF

44.4 KB Created: 2021-05-15 01:35:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9b95870495829e9bdb2237b79ebeb368 SHA-1: 83a9d5143912b76eb8c08142547b1fac7eb2f400 SHA-256: ce6066c8f7c9fd3d5275ae9a3f0a919345481789c322f44b6cd250a56b58b431
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 0.9632

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/app-master-game-hack PDF link annotation
    • http://schrichte.de/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/robux-app_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-free-spins-and-coins-in-coin-master_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000499f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499F 25496 bytes
SHA-256: 63b95ffec04a463e8df04500477c8a0ee4bc2be7177d689ed755fe432581218e
font_01_sfnt_off0000835e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835E 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D49 17460 bytes
SHA-256: 4464f59f323fc065d9701067f709c7b39ed9c448b1d3d372901e8849389ccaec

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