Malicious PDF — malware analysis report

Static analysis result for SHA-256 3436dffa07752d56…

MALICIOUS

PDF

45.4 KB Created: 2021-06-11 02:57:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b214eb13d1786498acdc0549178e681e SHA-1: be58e082cbf3165d6fadd1ffa9addbaebcdb3b00 SHA-256: 3436dffa07752d567057453ac8005dafd0c0c6edb5aba1b1f2d27618816c9b8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and generators. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake generator for Minecraft, directing users to the URL https://netcdn.tw/app/479516143/minecraft-pe-free-download-ios-no-jailbreak-game-hack, which is associated with malicious redirector activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/479516143/minecraft-pe-free-download-ios-no-jailbreak-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-hacks-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-outfits-girl_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-no-human-verification-or-survey-on-tablet_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_004_off0000557f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x557F 24916 bytes
SHA-256: 01f334cd81f7701cf5f2d9a53864a0c1c736da09b087cc27bb9930b45cd88a70
font_01_sfnt_off00008d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1F 18940 bytes
SHA-256: 384c56943b2f0ce7dd032d42d48bdddf0ac3b313714fbbfa672311f45c441041

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