Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa07fd3fe4b805f…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 19:20:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dcc09e5f44494f6d2fcd0803423a80ee SHA-1: c60b89c7516e6a528dcb99faf00cbc428a736ece SHA-256: afa07fd3fe4b805fbd0c42fa46715a76f24b4f34701008dfbbc1a913101ee0ef
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

This PDF document contains numerous links designed to lure users with promises of game hacks and free in-game items, impersonating brands like Microsoft. The primary malicious URL identified is https://netcdn.xyz/app/406889139/hack-coin-master-game-apk-download-game-hack, which likely serves as a redirector to phishing pages or malware downloads. The extensive link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/hack-coin-master-game-apk-download-game-hack.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/hack-coin-master-game-apk-download-game-hack PDF link annotation
    • http://pia2000.net/images/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/get-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-minecraft-codes_GM479516143.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_off000047da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DA 24696 bytes
SHA-256: 84840721cd6aab580c56ae9b58c274e46272b7e629a60a4f16d2e4b9e5e765aa
font_01_sfnt_off00007fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCC 18732 bytes
SHA-256: 4ebed6c5917eda7f6a467b80cf1b151ee52591b50f9ea0fed8e534379f201ae7

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