Malicious PDF — malware analysis report

Static analysis result for SHA-256 106cc8d635652548…

MALICIOUS

PDF

38.6 KB Created: 2021-05-23 08:37:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d27a64484071bf6cd3a0dfbe3d2e3d3d SHA-1: 30c89da531b96b5fca2075a864d4338b5b57ebc0 SHA-256: 106cc8d6356525484c784e9691585fbccbbdfbb736cc576e785222ad3453c80a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action button designed to lure users into clicking on a URL that leads to a 'free generator / game hack'. This URL, in turn, hosts further PDF files, indicating a multi-stage lure. The ML classifier also flagged this PDF as malicious, supporting the observed redirection and lure tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/431946152/free-robux-no-download-game-hack In PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/roblox-ban_GM431946152.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.lorengntb.com/new/public/ckfinder/userfiles/files/funbloxxyz-free-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000342f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342F 27432 bytes
SHA-256: 7f40adaf693b8e6237f7edf5b05140bfa80d77762a5a9cc044f7588fb479fa3d
font_01_sfnt_off000073d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 18824 bytes
SHA-256: a83584a15d83770571e134086905248a9fe783ccc3b424d06d308178a7ec7f42

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