Malicious PDF — malware analysis report

Static analysis result for SHA-256 9752e1942ea2c22a…

MALICIOUS

PDF

41.4 KB Created: 2021-05-15 11:31:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ebbe336ade6e3f8032c5dbdfee637639 SHA-1: 42903c2eed90f277d20cc9d707138028e994b9d6 SHA-256: 9752e1942ea2c22a83e643b18124d35fe20392843ff2799b385e707a302e9fe9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links designed to lure users with promises of game hacks and free currency. The primary link, 'https://netcdn.xyz/app/406889139/get-free-spins-coin-master-link-game-hack', redirects to known malicious infrastructure. The document's structure and embedded links suggest it is part of a phishing campaign aiming to exploit user interest in free in-game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/get-free-spins-coin-master-link-game-hack In PDF document text
    • http://stroyproekzia.ru/images/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://stroyproekzia.ru/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://stroyproekzia.ru/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/robux-gainer_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://stroyproekzia.ru/images/wurst-download_GM479516143.pdfIn PDF document text
    • http://stroyproekzia.ru/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000496b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496B 23940 bytes
SHA-256: 38a177a3210ebd758ab22f23455de73a1855329bca67ca15a8f3998f6fffb058
font_01_sfnt_off00008017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 18056 bytes
SHA-256: ab85056fbf29cd03dcfab7de7beb0343ed26656e2e8858e8ad52cb7aa31a5a92

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