Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed151ae3912fb1e…

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 17:08:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dfdea146e79942f4b3c6a7e1f9a64fec SHA-1: a55ea329a67706754f14334598fa2b574b837e16 SHA-256: 7ed151ae3912fb1eefc2c6dafb8bb87cd085e7a8c638f94f81c014c9e6143201
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free items to trick users into clicking malicious links. It contains a link farm of SEO-optimized PDFs hosted on potentially malicious redirector infrastructure, designed to drive traffic and potentially deliver further malware. The document body and heuristics indicate a clear intent to redirect users to external, untrusted 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-natural-disaster-fly-hack-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/hex-code-hacks-not-working-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cara-cheat-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cheats-and-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/dragon-ball-final-stand-roblox-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cheat-intuable-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-do-u-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-promo-codes-march-21-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-mod-of-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.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_off00002f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F21 21788 bytes
SHA-256: 9814dc8b9de19a4791330dffb16ab6df505c1266af8ee5948fc04b4d28106548
font_01_sfnt_off00005f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20 19344 bytes
SHA-256: c70aa1c7604622cf3e063948925e2f878d3cf53964f4748de67d89956155a056

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