Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2568bde94e2b0d…

MALICIOUS

PDF

43.9 KB Created: 2021-05-14 14:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 743a71db927c5186167edefe31b017b1 SHA-1: 14266399bf992a7aa274cb074f85ab79ceb873f1 SHA-256: 0a2568bde94e2b0d08bafdf51f67fba488151f15cb7aa09b42ef5339c814c174
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users to websites offering game hacks and free items, which ultimately redirect to malicious infrastructure. The document body and embedded links strongly suggest a phishing or scam attempt, likely intended to deliver a secondary payload or lead users to credential harvesting pages. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/free-roblox-generator-for-roblox-game-hack In PDF document text
    • http://drentklubben.se/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://drentklubben.se/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/static-moonactive_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004809.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4809 29232 bytes
SHA-256: 912a992c1788827251ca342211c8ec17b2ca60d09e95b07dce2910319e71ec6a
font_01_sfnt_off00008941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8941 18280 bytes
SHA-256: a933d21998376b1e1789d4c480c6983ef3f135197d1bc74c37b8b8f8713ff5e6

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