Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61feadab6fe128f…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 20:25:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9b0940e652adc8522fc496b368526f79 SHA-1: 8ede566bbf9d335a13e5fed33b23e8593688de0c SHA-256: f61feadab6fe128face2160c5406f9b34b972feec3575dbb30f0513abeccd482
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on "free generator" or "game hack" lures. These links redirect to malicious infrastructure, specifically a known redirector, which then leads to further PDF files hosted on a link farm. The primary purpose appears to be driving traffic to malicious sites through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • 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.tw/app/431946152/how-to-get-free-robux-no-human-verification-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-on-mobile-ipad_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/robux-generator_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/tiktok-free-fans-and-followers_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/get-all-the-tattletails-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/fps-roblox-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/pokemon-go-free-vs-premium_GM1094591345.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-get-free-robux-youtube_GM431946152.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
font_00_sfnt_off00002e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1B 22576 bytes
SHA-256: 41a862a586d10925622ce3ae5ee696ca74bfde037498f8449afcd4a309d733f6
font_01_sfnt_off00006056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 19496 bytes
SHA-256: 1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1

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