Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5e79ebc75e6982…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 07:19:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 27a56c3ab6c3e5b968cd3ad19535eb0b SHA-1: 58d43bf963dd21971300c23129606e730dd3a93d SHA-256: cb5e79ebc75e6982c856de03c4a35f1863a2fe752f0c5d1cee4f67b04c6475d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a redirector hosted on 'netcdn.tw', which is flagged as malicious infrastructure. The document body and heuristics indicate a lure for 'free generator / game hack' content, specifically mentioning TikTok followers. This suggests the primary goal is to redirect the user to potentially harmful websites, likely for further exploitation or credential harvesting. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/835599320/how-to-get-free-followers-on-tiktok-without-verification-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-fmswat-camp-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-free-robux-ad_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-parking-in-back-id-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/best-free-minecraft-server-hosting-reddit_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_off00003214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3214 22356 bytes
SHA-256: 652ad5daa6bb1e1692049224b4768d07015f8d7ae46317046403b726d33080a1
font_01_sfnt_off000063b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B2 18848 bytes
SHA-256: eef40dad123f201f59767262761087b891d1f963bf34255bdb8cfe50274e45f2

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