Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d1d82fc59c0855…

MALICIOUS

PDF

35.7 KB Created: 2021-07-07 20:27:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 965eb65c65cbad5ca976c0f66517351a SHA-1: da39e5f2e8c0358f975dba529d5ed614a1f5db6c SHA-256: f0d1d82fc59c08552b54aa7e85eca53cb0a71b06a3fd0c5f02db435a91e07202
220 Risk Score

Malware Insights

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

This PDF document employs a common lure of free in-game currency and hacks for popular games to trick users into clicking malicious links. The document contains numerous links to redirector infrastructure and SEO-optimized PDF link farms, indicating a phishing or malware distribution campaign. While no scripts were directly extracted, the PDF structure and embedded links suggest it is designed to exploit user interest in gaming cheats to lead them to potentially harmful content.

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-redeem-robux-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/core-exploit-v8-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/fr-ee-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/counter-blox-roblox-offensive-free-skins-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/best-free-skin-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/get-robux-for-freecom-on-computrt-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/freerobuxno-games-no-sighning-up_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-robux-catalog-items_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/money-money-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hack-roblox-origin_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-fly-hack-2021_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_off00003395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3395 22544 bytes
SHA-256: 464437ee14643e962822308259677dbbd241ba636763d7d1591c064e31329afe
font_01_sfnt_off0000666d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666D 19060 bytes
SHA-256: 2418f9a3910712e154162ba723da80a9ca97054b5f12f554d13c89fac8708d9e

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