Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f1e5f0faef774a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-20 09:51:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 682758144e10ef78c3e6065938708496 SHA-1: 52c0bf1899d29277f4f8b3ab3638c377f0e07ab9 SHA-256: 79f1e5f0faef774a043261446fd4248b7097f8f71740e035ba46b30f12949ea5
160 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links to malicious redirectors and further malicious PDFs hosted on suspicious domains. The ML classifier also flagged this document as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/406889139/coin-master-free-spins-for-today-game-hack In PDF document text
    • http://kfz-service-etp.de/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://kfz-service-etp.de/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://kfz-service-etp.de/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-tiktok-accounts-and-passwords_GM835599320.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_off00003031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3031 22872 bytes
SHA-256: 01f3ad94ecded1ad9644cc287fd76cf79535155469ed7a301e4e3232d0a3815f
font_01_sfnt_off0000636c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 18240 bytes
SHA-256: a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20

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