Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef702c8635644350…

MALICIOUS

PDF

34.3 KB Created: 2021-05-22 04:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad86bdbaa5368ec320ba6e18661a9c6b SHA-1: 6ca841e02bc4d3985d1a4b32e77395d0b4e4c9d3 SHA-256: ef702c86356443507708d3497f45d13356adea1baadd3dad8015f63d481eb460
160 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious redirector links, specifically targeting lures like 'free generator' and 'game hack' to entice users. The document body contains the phrase 'CLICK HERE TO ACCESS TIKTOK GENERATOR' and a primary malicious URL, https://netcdn.xyz/app/835599320/tiktok-fans-free-game-hack, which is associated with known malicious redirector infrastructure. The presence of these elements strongly suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/835599320/tiktok-fans-free-game-hack In PDF document text
    • https://www.saisystem.it/images/tiktok-free-view-uk_GM835599320.pdfIn PDF document text
    • https://www.saisystem.it/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.saisystem.it/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://www.saisystem.it/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://www.saisystem.it/images/free-mods-for-minecraft-pe_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
stream_002_off00003009.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3009 24068 bytes
SHA-256: 54d6e4ab6a0937b344cfb15aa4cd6c35dbbb2aa5531613633b224b974083ed49
font_01_sfnt_off0000663a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663A 17684 bytes
SHA-256: 22325babc2251f8239949cad6d45cc43a88f66264b3c8ea65c603fce63084c3f

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