Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a0a2f799bdc897…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 01:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a2b2f6bda8ceaf19e884c659311f6aa6 SHA-1: 30d7c222f12367508e1aea78611294b8f9013110 SHA-256: 05a0a2f799bdc89791540e2015e023d1885ef4b2f502c23bb8f8ed5af4cd4baa
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 PDFs with similar lures. The document body and extracted URLs strongly indicate a social engineering tactic to drive traffic to potentially malicious content.

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/free-star-codes-2021-roblox-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/cheat-roblox-lumber-tycoon-2-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-i-get-bloxburg-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/website-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-gang_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spins-coin-master-march-2021_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
font_00_sfnt_off000030b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B4 22284 bytes
SHA-256: 558628d4d74dd05bb4a6d5058aa58890d4061904f1fe0918918473e6af4a5234
font_01_sfnt_off0000623e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623E 19328 bytes
SHA-256: a1e02ad9d35ff11c3564c8d22c49a972b2bb4cdd6a04f6df9dd40472f18f9b6c

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