Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4562c6c4d37135…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 10:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ea5f86e5c4c7a3f3d84691c39be0860d SHA-1: 93f54aa37a7b2b4d75a3ac9df7c7a7cd5bc10ac2 SHA-256: 6b4562c6c4d371355f00c1dbdcc4386fcf612d19a1d65033838d4c25d84ee869
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDF files. The document body contains numerous URLs related to game hacks and currency generators, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • 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/479516143/free-minecraft-client-game-hack In PDF document text
    • http://lib.kesdammedan.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-robux-no-veracation_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-the-pizzeria-rp-remastered-fazcoins-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-roblox-t-shirts-thats-r-cool_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-get-free-coins-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-get-free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/hacker-scp-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/stella-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-gift-card-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/best-free-roblox-game_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-hack-2021_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_off0000305e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305E 22012 bytes
SHA-256: 925c35d4eb4a316599e4f88d4e30025093b249a52a425bf1e9248ce77f17a7b2
font_01_sfnt_off00006070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6070 17928 bytes
SHA-256: 06737be40afdd7807bcb221f1242e15b3899983b357bc9904bb842239db889be

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