Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0c9421ebf1d7db…

MALICIOUS

PDF

27.1 KB Created: 2021-05-12 13:59:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 28cc2ad3fae12e17497c87aea452621c SHA-1: 98fb661bb895595add5d77eaec7cb26cdc397c6a SHA-256: bc0c9421ebf1d7db191b62483a4b42aeaa02d59335c25776c3bfd193e8054df0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and generators. The primary redirector URL is https://netcdn.xyz/app/431946152/krnl-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into downloading potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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/krnl-download-game-hack In PDF document text
    • http://oddgraphic.com/images/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://oddgraphic.com/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45D2 14155 bytes
SHA-256: 00025dfb7a04cb4b83612fe350b40e90d1e31e91095361260ac06a7d2fa9a051