Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cdbde75d72531e…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 06:10:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 657562a86b6351fddf2da2eff1076dc6 SHA-1: b90b1ab6889c9d980c011347c2d177ba872fcf9d SHA-256: 07cdbde75d72531eb7cd154221e7819c4d48cd51586f17f2c94ef9ab19d4abdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-roblox-card-game-hack In PDF document text
    • http://guimaq.com.br/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://guimaq.com.br/images/free-coin-master-s_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_003_off00004a55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A55 26776 bytes
SHA-256: 695bae345155d0867ec8e1f3f17bd6797bba3ea494a674cc9ec0be16932e182a
font_01_sfnt_off0000866b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866B 18348 bytes
SHA-256: 112d0d0d53092b330ca0b2276e93dcc27866393801cc1956065b4b485469ba66

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