Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed5c0b7bd95f4af…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 08:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 81bd25d82b6d91054e15401670b904be SHA-1: 2631246a635122910c7e9806fcd414be6fd176f6 SHA-256: 7ed5c0b7bd95f4afb0071bf7301bce3230256a9734db6c0db47d685ca356ff2b
240 Risk Score

Malware Insights

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

This PDF document is designed as a lure, using the guise of 'free game hacks' to trick users into clicking links. These links lead to a redirector and then to a large collection of other malicious PDFs hosted on an IP address. The document body and heuristics indicate a clear intent to drive traffic to malicious infrastructure for potential further exploitation or malware delivery.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/431946152/how-to-change-your-roblox-username-for-free-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-online-pc_GM406889139.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/como-hacer-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-a-free-package-on-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-minecraft-bedrock-edition-for-free_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_002_off0000309f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309F 24020 bytes
SHA-256: e43140965a095195fcd0398266845212c2af5b9b1b08a3a91f05f6dfa9157948
font_01_sfnt_off0000677c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 19540 bytes
SHA-256: 931b08b03ca54b31686306823cbaeb68bb9b2d4519394e74376e5a024d3c9af4

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