Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4dc0953e4ce1320…

MALICIOUS

PDF

32.0 KB Created: 2021-05-14 02:54:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: eee83e6121b2fd84817d731aedd4a03a SHA-1: 70157da408773d3b8534fcaaf62e29fea8a078c9 SHA-256: b4dc0953e4ce13200d520f04c3c0c78ac53baf3f286747084a5a901f2a9e8874
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as game-related cheats and generators, with one primary link pointing to known malicious redirector infrastructure. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure designed to trick users into clicking through to compromised or malicious web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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/free-spin-link-for-coin-master-haktuts-game-hack In PDF document text
    • https://ibelive.com.tw/image/data/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD6 25236 bytes
SHA-256: aad0ea2a912029681cff8eb433897d0b44213b83998d8d49dd9d2694ece9c200

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