Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ff7799a381d124…

MALICIOUS

PDF

32.8 KB Created: 2021-07-06 02:06:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a3c3a62da931c44e3d3f74349154da66 SHA-1: 7c6a3455a84b5c8581f5bfdc7195e293e5cde900 SHA-256: 10ff7799a381d12491e88b907e1cfcf1618ebf584a0f59622310f26abc401fc4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on what appear to be game hacks and generators. These links redirect to malicious infrastructure, specifically the URL http://netcdn.tw/app/431946152/roblox-robux-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a scam aimed at tricking users into visiting these sites, likely for further malware delivery or credential harvesting.

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.tw/app/431946152/roblox-robux-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/account-stealing-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-best-hack-clients-virus-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-apk-mod-hack-robux-infinitos_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-clothing-how-to_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/wurst_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/20210-free-spin-links-for-coin-master_GM406889139.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_off00002c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9C 21676 bytes
SHA-256: 86a6a03a8c40d687368641b7888f580ddafe9f44a436d6012da0886f53d093f0
font_01_sfnt_off00005c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C16 18628 bytes
SHA-256: 91fe40ca7b1c63e097b3ed98f551f0053b3fa477182f2dddb1f8374deacdf7be

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