Malicious PDF — malware analysis report

Static analysis result for SHA-256 2960839952d2785a…

MALICIOUS

PDF

44.8 KB Created: 2021-05-12 08:01:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e23f74f2fd9412b2efac7b90f98758dc SHA-1: 39cee7a07de4b55d92f26979805a696678c55885 SHA-256: 2960839952d2785a2a186746f8fc9db4f7918523414a081acc7e076c880370cb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are part of a link farm designed to host SEO-optimized PDF lures for game hacks and free currency. One primary URL, https://netcdn.xyz/app/406889139/coin-master-daily-free-cards-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting these sites, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • 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-daily-free-cards-game-hack In PDF document text
    • http://ims-77.fr/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-accounts_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004856.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4856 25016 bytes
SHA-256: 7cb3026e1a57e339265e210dfa50470e3a550a4ebc748b19583ee02685341fd8
font_01_sfnt_off00008187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8187 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8B 18308 bytes
SHA-256: 0f25ff19bbb96414be395e76d71be840701757741be7b1a455de3e70536cac98

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