Malicious PDF — malware analysis report

Static analysis result for SHA-256 c249a35b56cd4824…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 10:42:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0ce82250d746b49e94764fbee9f495fc SHA-1: 978830aa7ccaafb5bd36935e87428c6c06ef8196 SHA-256: c249a35b56cd4824e868216b6f6d2ea7eafb33aeb29fe2c6f25d9462e6768a4a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were extracted, the presence of malicious links and the lure suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/406889139/coin-master-free-coins-amp-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/there-are-secret-ways-of-getting-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-robux-hack-mobile_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-trade-bot-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/earn-free-robux-for-roblox-bux-city_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-players-that-give-free-items_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-synapse-hack-download_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.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
stream_002_off0000307e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x307E 22844 bytes
SHA-256: 334b0b9d66280aa11a1850c78623b50229137baaa5d1fa528a19936d3092ce5b
font_01_sfnt_off0000638e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 18432 bytes
SHA-256: 115052c54ad7be7ecf7f7200d638d52990c020622732c51f9e53714cbdbedbdf

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