Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e25e6b70969276…

MALICIOUS

PDF

35.5 KB Created: 2021-07-01 06:32:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bc9d290901ae7add72098f38924ad29d SHA-1: 8396976ca0a48646a221e8cfc20d5e4d2b36f928 SHA-256: a1e25e6b709692768c7a01069a16e9d84ad95ed95138f0ecd2020ff78347c7d7
220 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are presented as game hacks or cheats for popular games like Roblox and Coin Master. These links likely serve as a lure to download malicious software or lead to further malicious redirectors. The ML classifier strongly supports the malicious nature of this PDF.

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.co/app/431946152/download-flying-hack-for-roblox-game-hack In PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-cash-roblox-pizza-place_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/a-game-were-you-can-get-free-robux-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-street-simulator-money-cheat_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-roblox-builders-club-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hacker-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-murder-mystery-roblox-to-download-free_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-roblox-promo-codes-march-21-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-how-to-get-free-codes_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
font_00_sfnt_off0000325e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325E 22264 bytes
SHA-256: 55a5a9dce55e5fb618a55d4eadb92162922fa403f14d2496dc0528fe7fd2dbe8
font_01_sfnt_off000063f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 19628 bytes
SHA-256: a188f50d450f3ce77183edbe6ec595242d5acf436f852aedf7e862a613acabcc

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