Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b8805f93d75889…

MALICIOUS

PDF

33.0 KB Created: 2021-07-04 12:34:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8539105ce4260586cd4450857f03a5ef SHA-1: 950cedc8f534194a987b5aae09848de266b0c67d SHA-256: 36b8805f93d75889db510f229839f1eb02fdbe81f7218dc6169e24276d7835f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a known malicious redirector infrastructure. The document body and heuristics suggest a lure for game-related cheats or generators, aiming to trick users into visiting the malicious URL. The primary IOC is the redirector URL, which likely leads to a further stage of the attack.

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/minecraft-download-free-download-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/can-roblox-determine-the-ip-address-of-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-a-free-knive-in-roblox-cbro_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-roblox-accounts-in-game_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cheat-roblox-menu-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-skin-maker_GM479516143.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_off00002eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB9 21484 bytes
SHA-256: 31d84536478f737128158ec20a1ddaa7215fbcf59efc6dba08f90a3610ccd310
font_01_sfnt_off00005d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6D 18576 bytes
SHA-256: 40aa17af32215803f1fba4a6734646ab30a634826190d5834ae8dd781bed6596

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