Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93dd58c43e58ab7…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 03:06:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 32e344c6b70dd46cd6a91b6b96ff2be8 SHA-1: 2eaee9b5869d89044f0ed6ff1faecdffb6317914 SHA-256: e93dd58c43e58ab744f678ecdca3a01ff5f27e3d3a68646ee5b4232cf3b5503f
220 Risk Score

Malware Insights

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

This PDF document contains numerous links to external sites, many of which are SEO-optimized PDFs designed to lure users with promises of game hacks and free currency. The primary redirector URL, http://netcdn.co/app/431946152/speed-hack-cheat-engine-roblox-game-hack, is flagged as malicious. The document body and heuristics indicate a phishing or scam attempt leveraging popular game titles to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/speed-hack-cheat-engine-roblox-game-hack In PDF document text
    • http://artistaone.co/userfiles/files/robux-hack-no-human-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/working-free-robux-obbys_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-do-we-get-free-robux_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
font_00_sfnt_off00003109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3109 22612 bytes
SHA-256: 2593f5b7e8365b439aa8f5f42d99f45e84bb1afe902c2827a56de8acd7a4deee
font_01_sfnt_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 19396 bytes
SHA-256: 6808df268723acdfdad1673452964c4d224534ec6483120df0da256e0f085c5d

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