Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0a97f966f9cfce…

MALICIOUS

PDF

41.6 KB Created: 2021-05-13 01:25:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9a598dca64ab9d8944c5cb1e6a836800 SHA-1: 75ab83c34c9bcab5dc38be1e58115327b4a70ee1 SHA-256: da0a97f966f9cfcea65f337a384644517651da0ca29dfb0f21e75a5aa675c4b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure for free in-game currency and items, directing users to malicious redirector infrastructure. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/coin-master-free-spins-link-download-game-hack', are indicative of a phishing or scam campaign designed to lead users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit user interest in gaming for malicious purposes, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-spins-link-download-game-hack In PDF document text
    • https://pneukalousek.cz/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pneukalousek.cz/images/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/robux-free-c_GM431946152.pdfIn PDF document text
    • https://pneukalousek.cz/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • https://pneukalousek.cz/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://pneukalousek.cz/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://pneukalousek.cz/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pneukalousek.cz/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • https://pneukalousek.cz/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://pneukalousek.cz/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/coin-monster_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://pneukalousek.cz/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/corn-master_GM406889139.pdfIn PDF document text
    • https://pneukalousek.cz/images/coin-master-hack-2021_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_off00004884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4884 23936 bytes
SHA-256: af8abf871b028fa53c3e982ca0f8dcb2d3445f76f0059a2828a3b9ec1fb541da
font_01_sfnt_off00007f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F06 18636 bytes
SHA-256: e0ee4d28e9fbd90893640acb023fdb3433a7d18e360fd79b0a1965f7934d0c46

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