Malicious PDF — malware analysis report

Static analysis result for SHA-256 701f656fd1dbcec2…

MALICIOUS

PDF

44.4 KB Created: 2021-05-17 19:08:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8a077a8bceec4bd0f30056f759289966 SHA-1: e84c0f6b85abd87cdabc05965f366f63c538cfac SHA-256: 701f656fd1dbcec2708ac6ea6f40fcc63b18fbb5adccb7f5dd62ff55da998938
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free generators to trick users into clicking malicious links. The document contains numerous links to external PDF files hosted on what appears to be a link farm, designed to obscure the ultimate destination. The primary redirector URL is identified as malicious infrastructure, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/hack-coin-master-pc-game-hack In PDF document text
    • http://livsgnistans.se/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-app_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABA 24908 bytes
SHA-256: 9ac1da0d96228dfa8e55f2ee82de61ef54d143740caa76387bda38ddd7d0d72e
font_01_sfnt_off00008234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00008c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5E 17868 bytes
SHA-256: d0fcbd0a52ba681250a66b5fd254fe701dbce3b80d82eca2366e1a97fce9e3f6

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