Malicious PDF — malware analysis report

Static analysis result for SHA-256 593f77a241da64df…

MALICIOUS

PDF

48.0 KB Created: 2021-06-13 23:24:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3d541472920a76f47660fbb58e939def SHA-1: b3b0b72b46e2ebd720cb93f4c032f6c3d1fb2f1c SHA-256: 593f77a241da64dfce9fe437a78a031017dc1009f4d09c7491d8ffaa155ade0d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on game hack generators and free currency schemes. The primary link directs to a known malicious redirector infrastructure. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites, which could lead to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/cheat-codes-for-roblox-xbox-one-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/roblox-hack-2021-working_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-booga-booga-mojo-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-mad-city-vip-server_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/noclip-hack-roblox-jailbreak-may2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-buy-robux-for-free_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/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-engine-how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/mount-everest-roblox-free-rescue-gamepass_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pack-free-maps-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-gift-cards-live_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD6 29180 bytes
SHA-256: 924a5a3ea7fa7157a964900c09a216629249e3e28ab4a142dda695796f258b64
font_01_sfnt_off00008bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBF 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9867 18620 bytes
SHA-256: 84ac82a963c19070decc96db964b343c54270c31268b48d6b639d7976659a8c5

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