Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84c7fc5af91106b…

MALICIOUS

PDF

44.2 KB Created: 2021-05-18 02:32:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5315263050ca21d1bb955b609fb02077 SHA-1: 5022bd06720b48feb79579e1ccba51eff6b0430e SHA-256: f84c7fc5af91106bbc29942c3d7de5ca94899705a9d36e8a0e9c66a7e79141a3
260 Risk Score

Malware Insights

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

The PDF document contains numerous links to external sites, many of which are structured as SEO-optimized PDF gateways for game hacks and free currency lures. One critical link redirects to a known malicious infrastructure, impersonating brands like Microsoft to likely facilitate credential phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the observed phishing and redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-arsenal-hack-game-hack.
  • 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.xyz/app/431946152/roblox-arsenal-hack-game-hack In PDF document text
    • https://javexglobal.com/image/data/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/114-hacks_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/microsoft-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
stream_003_off00004aaa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAA 28028 bytes
SHA-256: 4cf07e30269353f0d280519c749905a04a3d63a2109ad3ce201316eb6a09f898
font_01_sfnt_off00008acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACF 18184 bytes
SHA-256: 950cb6c94e3217e8d5edf097fa87367098c5f84c9f1c4255a513a3effc23c56b

Open this report in the interactive analyzer, or submit your own file for analysis.