Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67c5208fa3945e3…

MALICIOUS

PDF

43.3 KB Created: 2021-05-15 03:48:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c561143130904644eae19c5f708780e1 SHA-1: 3bd6177576ca5babaf56e1d28bab8a04e8e0b26c SHA-256: a67c5208fa3945e3fff1ca37a2f9bc79ba51a89d27b657e28e5a1ed92f543aec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links that redirect to malicious infrastructure, masquerading as "free game hacks" and "free Robux" generators. The primary redirector URL is https://netcdn.xyz/app/479516143/minecraft-java-code-free-game-hack. This indicates a phishing or scam attempt designed to lure users to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/479516143/minecraft-java-code-free-game-hack In PDF document text
    • http://brokermortgages.com/images/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-website_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
font_00_sfnt_off00004ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ACE 30288 bytes
SHA-256: b631a8d3447045d5a385f6b1b801cc9eb9ff3f215287cd815afb03e42621812a
font_01_sfnt_off00008785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8785 18164 bytes
SHA-256: 9f11f6ffdaa6f71614cd3df9f38f5d5af32d3843530a13967cf59faad31feba0

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