Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb600015a12bdce…

MALICIOUS

PDF

29.3 KB Created: 2021-05-10 19:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d37bf86b518e6dfc4e11712ef99c8c6b SHA-1: 864fa89616d92449f9042d9eb1ac220b2b1f068c SHA-256: 1fb600015a12bdcee3560a1027d09492be7d535265f1779112a2b5fac44e28cc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hacks or generators, such as 'robux-without-verification-game-hack'. The document also hosts a large number of links to other PDFs, forming a link farm. The primary malicious URL identified is https://netcdn.xyz/app/431946152/robux-without-verification-game-hack, which is flagged as a malicious redirector. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

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/431946152/robux-without-verification-game-hack In PDF document text
    • http://www.copoint.co.uk/images/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-coin_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-infinite-robux_GM431946152.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
font_00_sfnt_off00002102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2102 20896 bytes
SHA-256: 8e70aa1d76ccc301bfcaf8506baf2a9a7c3ea03d4ee5542125575a5bc74dc561
font_01_sfnt_off00004e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E46 18800 bytes
SHA-256: 8dd03be5ed9b12d1c3526750c50f565b8632fbaca0af0073180c26b06898ff47

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