Malicious PDF — malware analysis report

Static analysis result for SHA-256 5811ee4b3824c202…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 17:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 670f78409f01b3591317a8faaa2fe1df SHA-1: b7f5e2f53cbad4a5a77d1a8374349b3900b4b49d SHA-256: 5811ee4b3824c202159211ce8a72c63b45d09c23d85301366aed88026cf74251
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on "free generator" or "game hack" sites, which are identified as malicious redirectors. The document body and embedded links promote various scams related to popular games and applications. No scripts were extracted, but the primary attack pattern involves social engineering through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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 http://netcdn.co/app/431946152/roblox-cheat-engine-trainer-game-hack In PDF document text
    • https://nendientu.com/public/upload/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-pokemon-go-accounts_GM1094591345.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/comment-avoir-un-mode-de-cheat-sur-roblox_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/panel-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/all-coin-master-spin-link-and-free-download_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
font_00_sfnt_off00002f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F88 22260 bytes
SHA-256: 0daa8ab5bcbc9bf7144e759e6635a0b5c5b55bc66c241dc5a18e447436ba02a0
font_01_sfnt_off00006114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 18876 bytes
SHA-256: 0194558e09a7a83b55ed9d7ccc0c0503dacef8969f5d354a74333e9bf1cfbcca

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