Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbf58e4471f85de…

MALICIOUS

PDF

23.3 KB Created: 2021-05-15 07:48:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7fd5744bf5e488bc51bbadd42c93f0ea SHA-1: 1fd1cceb34c5483f71e4893cdfe82361f356d93d SHA-256: 2fbf58e4471f85dee9effa3c4d07329549864d79f4099868865f6854801c1e69
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on domains associated with link farms and redirectors. The primary link directs to a "coin master hack" generator, suggesting a lure for users seeking in-game advantages. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection and link farming activities, likely intended to drive traffic to scam or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hack-co-game-hack In PDF document text
    • http://gomelavto.by/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a9a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9A 6406 bytes
SHA-256: 4cffa70d5d3a60d11664392f442e94cdeedad09ff74c12b1d2094b882def531c

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