Malicious PDF — malware analysis report

Static analysis result for SHA-256 3079f7ed7e2f81bd…

MALICIOUS

PDF

41.1 KB Created: 2021-05-19 21:43:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7e7b3b2bbbb1fe813833e913b910a03f SHA-1: 9a37cc18bb3de5aef8b88a6a409664f3208c36fa SHA-256: 3079f7ed7e2f81bd3899082ca029dad2d91762956d6ed7c9a57a045ffcb3e8b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'generators' for popular games. These links likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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 https://netcdn.xyz/app/1330123889/pubg-uc-load-game-hack In PDF document text
    • http://lib.unar.ac.id/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/pokemon-go-free-remote-raid-pass-march-2021_GM1094591345.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/robux-free-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
stream_003_off000046e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46E9 24776 bytes
SHA-256: 90aee989c97ab18db787e2dd6387995c975dd3b4ede06d027b277c6c98fff615
font_01_sfnt_off00007d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D94 18440 bytes
SHA-256: 5cc4c1a8a0516e352a9cc0835f275b0938c80617f103e60c0fcc4592072f9664