Malicious PDF — malware analysis report

Static analysis result for SHA-256 86142b0b670db310…

MALICIOUS

PDF

32.7 KB Created: 2021-07-20 17:56:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 002d415c2c12e72ada958f115f5af3d9 SHA-1: e7ccfc05e73c27688b3d89c0a7cb9cbc65483072 SHA-256: 86142b0b670db31069e51977403c6b9d8c16bad0cc34533557fdfe22e23595c5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body text and heuristics confirm the intent is to trick users into visiting a URL that likely leads to malware or a scam. No scripts were extracted, but the primary attack vector is the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/431946152/free-robux-websites-no-human-verification-game-hack In PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-minecraft-mods_GM479516143.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
stream_002_off00002a6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A6A 22056 bytes
SHA-256: 8e49c454d4ff2d1882ed7c69c3ce2c1919999d11913838dff24a4a64700d6f4e
font_01_sfnt_off00005afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFE 19244 bytes
SHA-256: 659ef84f93a83877f43ad6c8b94ff610d3a9fae26b98e312ee47b1fc3a7bcb1d

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