Malicious PDF — malware analysis report

Static analysis result for SHA-256 1551fa8569c7dd0a…

MALICIOUS

PDF

38.3 KB Created: 2021-05-23 12:11:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: de1cc509a9e64333656711860f58abaa SHA-1: efa96ac5ad014cab29c5ba2312715dd8bd6d37e5 SHA-256: 1551fa8569c7dd0a50625bdc43a70810f7340b8108a685d230407b0496083ceb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, one of which is identified as a malicious redirector. The document body and heuristics indicate a lure for 'free generators' or 'game hacks', suggesting a phishing or malware distribution attempt. The embedded links likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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/835599320/free-fans-on-tiktok-game-hack In PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BC 26312 bytes
SHA-256: 27234161db76bd4c1914de30c585470f90e16907cc575d537d40822903fcd45d
font_01_sfnt_off00006c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C32 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00007618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 17684 bytes
SHA-256: c4bad94708efb6699dc1c2f19668affdeb9abfa27890915707a4ba319d25bbbf

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