Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e3c6118e6ebbc5…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 10:58:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: be0510523e264defd60fa92e1c39b163 SHA-1: 349757c8a79b36ae470240721cba1eb14c5a7061 SHA-256: 53e3c6118e6ebbc5b37610583ce364d351fe4da061d0eb1c268c968f9548413a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which is likely intended to lead the user to a further stage of infection or phishing. The document's content and embedded URLs strongly suggest a social engineering attack aimed at users interested in popular online games.

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.co/app/431946152/roblox-hacks-murder-mystery-2-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-dominus-rex-and-messor-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblux-robux-hackhacks_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-how-to-make-a-tshirt-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/pokemon-go-free-coins-ios_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-into-a-roblox-acount_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-robux-on-roblox-with-cheat-engine-64_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_off00002d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1B 21772 bytes
SHA-256: 9c70d579cf9e8d96ffbb366a90048c701e1dd97e985b797b6bde859ecf5fac31
font_01_sfnt_off00005d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D10 19576 bytes
SHA-256: e9d29711ba232645b78da996d949266abad534454997caa309a7054f84f6afd7

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