Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bad501fa133daab…

MALICIOUS

PDF

35.4 KB Created: 2021-06-25 17:16:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9598a445df085fe84aedc1731f6867a5 SHA-1: 9b1d933cc560ade33804eea92cff54f25213b9e5 SHA-256: 0bad501fa133daabd1d51531838ec25b033daddfece4d9a0161c412d459bdb57
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure related to game hacks and free items, which is a common social engineering tactic. It embeds a URL that is flagged as a malicious redirector, indicating a high likelihood of leading to malicious content or further exploitation. The ML classifier also strongly flagged this PDF as malicious.

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/best-creators-on-roblox-with-free-cloths-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheat-files-download-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/dragon-ball-fury-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pastebin-free-robux-hack-no-wait_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-robux-into-your-car_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-link_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
stream_002_off00003220.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3220 22768 bytes
SHA-256: 6b9fcdd705b472c91b04e004af4112d3d015bf698f380e243fcfad784c25391a
font_01_sfnt_off0000650e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 19240 bytes
SHA-256: 095f92beee6e420890608217abfb8bb04e710f7147198e1f7e25dff97375997c

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