Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ad0a870226f8a0…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 12:07:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b2d189213b31ee2020fcbf08b222e15b SHA-1: b4c550702277e7bd47596c675cb4ba115580a134 SHA-256: 60ad0a870226f8a088fdb9f3fd2dff2e51bed80b54d18e40e08feebc1979d58c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links that redirect to sites offering game hacks and generators, such as 'Coin Master Apk Hack 2021'. Several heuristics indicate these links point to malicious redirectors and a link farm designed for SEO manipulation. The document body and extracted URLs strongly suggest a lure for potentially unwanted applications or further malicious redirection.

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/406889139/coin-master-apk-hack-2021-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-hack-tool-robux-and-tickets-download_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/bypass-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-items-code-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-retail-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-u-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-for-wieght-lifting-simulator-3-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coolest-roblox-hacks_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_002_off00002d99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D99 22908 bytes
SHA-256: 8999a9dd7f6b2370ddaf2767e9060760a08415d3223022dcbade6478d6bf20cb
font_01_sfnt_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 18580 bytes
SHA-256: 9ddf7aed626e59ba525b858e6801d404809e6e62faeb09e5b62449fd66731fe4

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