Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce94c361e6f6a71…

MALICIOUS

PDF

47.9 KB Created: 2021-06-09 15:22:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 55c1051ece46797aa45b2a25724be770 SHA-1: df6b4847a90b74802dfc727201e727ee68a78e3a SHA-256: 9ce94c361e6f6a71c708c3ab97ac721f6a4dbfa0585a46a50af60ea8a18bec94
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game currency or "hacks" to entice users. It contains multiple links to known malicious redirectors and potentially malicious content hosted on external domains. The primary malicious activity observed is the redirection of users to external sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.tw/app/431946152/how-to-get-free-robux-on-roblox-with-cheat-engine-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-shavacadoo_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-script-executor-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/descargar-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-clothes-and-hair-girl_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-jailbreak-free-money_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/ezrewards-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hacking-classes-for-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-without-using-apps_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-online-play-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-back-a-roblox-accunt_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/impact-hack-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/nuevo-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-modded-minecraft-server-hosting_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
stream_004_off00005515.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5515 28280 bytes
SHA-256: d2165f6bce8de8bb3a851fabffd853ea54e5061d21b15258a3720ed02caa8d86
font_01_sfnt_off000095bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BC 19356 bytes
SHA-256: 4b002bafb6b0ab0cf54223285d4818c4f8fe83b77dd547179dadd48a120cf6a7

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