Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa68905bc5b09d8c…

MALICIOUS

PDF

39.9 KB Created: 2021-05-21 18:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6076861a11916f3b3c61c9b3e1bfb24 SHA-1: 590f81e8d252a00c9bae5e2253e61fadc333e22a SHA-256: fa68905bc5b09d8cab95e9e3dd6dd61b654abd2c5b39d9c29d904d998ef33aa0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body explicitly mentions 'free generator' and 'game hack' lures, and includes a call-to-action phrase. These elements, combined with the ML classifier flagging the PDF as malicious, indicate a social engineering attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/406889139/free-spin-coin-master-2021-link-game-hack In PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003201.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3201 26948 bytes
SHA-256: 51ee59f3e0415f515bad4355b74aa045fa61a3d772f092b3314c9b06ad5d9267
font_01_sfnt_off0000702d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off000079cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CF 18456 bytes
SHA-256: 7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56

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