Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7accdb564bedda…

MALICIOUS

PDF

38.3 KB Created: 2021-05-21 18:01:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: faa84beafbebcbb29096424a30573cba SHA-1: 4c498a26723691b8ab9f7ae5b4bb9632dae909e2 SHA-256: de7accdb564bedda41c8bb559cafc3ebd9e6d2a1e9edcf1c190a19d58ffcd209
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/is-tiktok-app-free-game-hack PDF link annotation
    • http://neltalen.nl/images/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://neltalen.nl/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/minecraft-pe-016-0-apk-download-free_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_off00003368.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3368 31208 bytes
SHA-256: c6fb9fd37aad4f79fc5aec2c1f72e31ddf9017cee1f6eb136acbb6466e2baeb2
font_01_sfnt_off00007699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 17632 bytes
SHA-256: 5f52ba2e19c2ccb4ce1169e828da1869a3978b1b2358f711c7393d0a290af5b7

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