Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa112cb6da4b63fa…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 07:49:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2745864860d86a45442385b9ddd5bdb8 SHA-1: 77cd26dd4c750210918f48e83b6d359745577e6a SHA-256: fa112cb6da4b63fa3acdd2cca1926164085ba52e9528fdc7273d42e1e305f866
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on domains associated with link farms and malicious redirectors. The primary lure appears to be related to 'game hacks' and 'free generators' for popular games like Minecraft and Coin Master. The document body, though partially corrupted, contains URLs that align with these lures. The presence of multiple critical heuristics related to malicious redirectors and link farms strongly suggests a phishing or malware distribution attempt.

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/479516143/aternos-free-minecraft-server-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/games-with-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/admin-code-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hacks-for-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-items-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-115-2-hacks_GM479516143.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_off00003483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3483 21732 bytes
SHA-256: ed2b62d6935ace8aae0ffc1e5b5753fd409ad77322470c81e490ee718156e077
font_01_sfnt_off00006407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 18112 bytes
SHA-256: 26876140927a3906902dd64e2dc8e0c32e7e876521c7e838639d73c9f18b3cb1

Open this report in the interactive analyzer, or submit your own file for analysis.