Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dcfd10c3ef24dd…

MALICIOUS

PDF

32.8 KB Created: 2021-07-06 21:20:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc0c6d0b6c6b690a34ad760825e07ef1 SHA-1: a3a00b174543a8c4a08934458b23fa64a48b4caf SHA-256: 72dcfd10c3ef24dd4b24f98fdbcb445d6be82b3becc041009f297b0fff55638e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one identified as a known malicious redirector, leading to a lure for game hacks. The document body and heuristics indicate a phishing attempt to trick users into visiting malicious sites, likely to download further malware or exploit vulnerabilities. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/1330123889/pubg-uc-free-hack-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/hack-treasure-hunt-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-live-now_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-someones-account-on-roblox-2021-february_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/tiktok-free-promotion_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-in-roblox-2021-iphone_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/foxyhackscom-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-pints-on-earn-robux-gg_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-giver_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-giveaway_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_001_off000027f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x27F5 23624 bytes
SHA-256: 1c8ecafd30965c21b33b1c5106a4766a3620975bb42b87d2b1e65d4cca8fe896
font_01_sfnt_off00005d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 18460 bytes
SHA-256: 9fd58b0400486ccae59dbfc9ebd089036a8909cb72c39339595926b4d13c159d

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