Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88d282f3faf5974…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 02:37:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fe2dd06388eb54ff1e70bb2870a22795 SHA-1: e18241a3e414cfb122860679478a373ef76028d0 SHA-256: f88d282f3faf59743a1d382ea71146a339205fd2ab5c7d63c27cf31f1534108c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, including a known malicious redirector at http://netcdn.tw/app/406889139/kachifpro-game-hack. These links are presented as lures for game hacks and free items, indicating a social engineering tactic to drive traffic to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.tw/app/406889139/kachifpro-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/cheats-for-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-giveaway-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/mage-free-hack-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-admin-roblox-how-to-get_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.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_off000030e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E0 22892 bytes
SHA-256: 0efc2afb63df924fca85d8e19760ccda394ccaf2efa8457f57a5eb9806e3ce6b
font_01_sfnt_off00006449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6449 18072 bytes
SHA-256: 72a3da90a05afc5dc46f93167f9d09aeeb78081726754e710800ebd664932104

Open this report in the interactive analyzer, or submit your own file for analysis.