Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfb08bf2590c77b…

MALICIOUS

PDF

32.0 KB Created: 2021-06-27 09:21:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9c183a6bfa45c6757b62610270ac14cf SHA-1: d3a85dd034d58dc0af4fa4d4c4e3c85ddef15480 SHA-256: acfb08bf2590c77b609c3fea95b3003f042ba85318adec4894abd3a679c3324b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically targeting users with lures related to game hacks and free currency generators. The primary link, http://netcdn.co/app/431946152/easy-way-to-get-robux-for-free-2021-game-hack, is presented as a "free generator" and is associated with known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to a potentially harmful site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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 http://netcdn.co/app/431946152/easy-way-to-get-robux-for-free-2021-game-hack In PDF document text
    • https://yowchang.com/image/data/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/roblox-lumber-tycon-2-menu-no-cheat-engine_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/make-your-own-roblox-skin-for-free_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/robux-hack-video_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-add-robux-to-your-account-for-free_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-use-free-gamepass-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3146 22176 bytes
SHA-256: 29d6de89eec0834ed14482cbaa9e93ca469580bc6c204ab7269dc11d180535b0

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