Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b4b9cdbd6d6224…

MALICIOUS

PDF

35.1 KB Created: 2021-06-22 23:55:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4b08f23f217adafdb180ad01191d42f0 SHA-1: 4eabfc3986c84d166f1df185607e5cb8553e4528 SHA-256: c1b4b9cdbd6d6224020eb52fcce538cfd1b776ed7a9595514989310ed03e657e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into downloading potentially malicious files, masquerading as game hacks or generators. The primary link, http://netcdn.co/app/431946152/roblox-hack-robux-2021-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into executing further malware. No scripts were extracted, but the presence of embedded URLs and the nature of the lure strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/roblox-hack-robux-2021-game-hack In PDF document text
    • http://zarinnameh.ir/images/robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-make-items-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/pubg-uc-malaysia-murah_GM1330123889.pdfIn PDF document text
    • http://zarinnameh.ir/images/cardcode-pw-free-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-hack-apk-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/someone-hacked-my-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/hack-for-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-in-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/earn-free-robux-website_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_off0000302a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302A 22916 bytes
SHA-256: 9f083e365454ff7a980004cba2071467df6a3aced72f3723e66eebd5c5b37446
font_01_sfnt_off000063ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AC 19200 bytes
SHA-256: 84c5ff5965211f89041d87bccb0594bff3a79cea557fd8953f22112aaeccd919

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