Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5236a47b5fc4265…

MALICIOUS

PDF

31.9 KB Created: 2021-07-19 01:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2ff839bd4ebfc9b073a3a6d21a8d25db SHA-1: a6d94798588163e0231f6d6a96ef2d2f070ec765 SHA-256: e5236a47b5fc426551d93690937b0db0adf83b7e2d20614b30c4ec5fc699ad5c
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, specifically advertising 'free generators' or 'game hacks'. The document body also contains a call-to-action button text, reinforcing the lure. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves tricking the user into clicking a malicious link, likely leading to further exploitation or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9445

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/hack-tiktok-fans-free-game-hack In PDF document text
    • http://gestibrok.com/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAC 22248 bytes
SHA-256: 9909602f27fa3ad454e35990d32934a4163364f6f9041d1d9be8b384c8678925
font_01_sfnt_off00005cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDA 17684 bytes
SHA-256: 3b18324811ff9b2016b67c954de883c0131a9d703a91aa0a24a49898f2a8c27e

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