Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24ba229af362e53…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 18:52:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 87e64956e4c1fcf3475c64714d40bf52 SHA-1: 6c04bb8b009ec8a37d60d1cfe3f88b19d7e351ff SHA-256: a24ba229af362e53d58acf02316c5b63cb0d34ae7ba69f8f7f7f42c9cf473c8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering 'free Robux' for games, a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to direct the user to a malicious site, likely for credential harvesting or further payload delivery.

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.tw/app/431946152/roblox-free-robux-game-hack In PDF document text
    • https://www.metal.hr/files/roblox-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/roblox-new-monstersimulator-hack-script_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-clibait_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/code-cheater-unboxing-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-free-robux-for-free-in-2-mins_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/junio-2021-hack-robux-en-roblox_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/descendants-2-games-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316C 22544 bytes
SHA-256: c1e2c1fe99223563ee9aff7f1783ecf69ddda36c8862b76d29dc60e2317c421f
font_01_sfnt_off00006361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 18788 bytes
SHA-256: 240f26960413d3375b32b54d3a16c3eb3bd7324ec8649811f17e0fe1da2802cb

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