Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc03d346839a6e28…

MALICIOUS

PDF

46.9 KB Created: 2021-06-01 12:23:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ae6003d11bca77e36fbdd14b4a59593e SHA-1: a454bc13f0cd211b6756fbb14315f9c2bfc3d1ea SHA-256: cc03d346839a6e28ff5d3739b5a7a38bcbeb689d2c7c3e25cb282e0d0b983c1e
220 Risk Score

Malware Insights

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

This PDF document employs a lure of free Robux and game hacks to redirect users to malicious infrastructure. The document contains numerous links to external PDF files, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-hack-no-scam-game-hack, which is flagged as a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.xyz/app/431946152/free-robux-hack-no-scam-game-hack In PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-diamonds-in-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/hacks-para-cb-ro-roblox_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-free-robux-using-cheat-engine_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-roblox-bubble-gum-simulator-accounts_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/roblox-dbz-final-stand-hack_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/como-hackear-un-juego-de-roblox-desde-ordenador_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-roblox-on-a-computer_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/secret-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/v3rmillion-roblox-hack-download_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_004_off00005095.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5095 30628 bytes
SHA-256: 37fe3f463bf0a73bec27764c34f7f07a63602860e39aca19db274eae432647eb
font_01_sfnt_off000093c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C2 18672 bytes
SHA-256: f73ec414f05eb6397ecf7b98c43238d31b35b28cf7c057618056aa7d0a0cd775

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