Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d62b086d2efebcb…

MALICIOUS

PDF

36.5 KB Created: 2021-05-21 14:16:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: af2643e0e241e2639f5aed4136394773 SHA-1: 7bf6c8239f3bf060ff9b349be37742cdc9c92e83 SHA-256: 0d62b086d2efebcb2cd5c73ef51a37f8c0626f3d544ee58f6678978e984b7a36
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and malicious domains, masquerading as game hacks and generators to entice users. The 'ML_NYX_PDF_MALICIOUS' heuristic and the presence of known malicious redirector infrastructure strongly indicate malicious intent. The document body also contains explicit calls to action, such as 'CLICK HERE TO ACCESS ROBLOX GENERATOR', further supporting the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/kuso-icu-roblox-hack-game-hack In PDF document text
    • http://cornerwebstudio.com/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/pokemon-go-free-team-change_GM1094591345.pdfIn PDF document text
    • http://cornerwebstudio.com/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-hack-app-for-iphone_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
stream_002_off00003345.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3345 25196 bytes
SHA-256: a599aff6935ee08e6364e8a37e31555876a349019b1c1f89c7713434c3688417
font_01_sfnt_off00006cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 18320 bytes
SHA-256: 67b96beca271d5ff8db6d4205f4bcb305d403275eb03eb731bd8bb208d3be0d2

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