Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02f638db9000092…

MALICIOUS

PDF

52.3 KB Created: 2021-06-07 20:41:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8548bce987ea1787ca5c43863729274e SHA-1: 18ec6543ad8c67d4398d371778f632802ec12e6b SHA-256: f02f638db9000092333429d0d94e942aa0fb544ca28eb11312a9bba6a505d92a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/jailbreak-robux-hack-game-hack PDF link annotation
    • https://www.bmta.co.uk/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/snapse-hack-roblox-2021-anti-ban_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-items-catalog-roblox_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://www.bmta.co.uk/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000537f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x537F 24956 bytes
SHA-256: 44c892289756fc2acaab1838d692eca7c6355eacc22f27f1e4f2299ba62cd725
font_01_sfnt_off00008d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D87 8356 bytes
SHA-256: 4d0aa0c5ba125ffbe68efea0ba9b82ed9e492c9ce9a48efa3817ad83f1df54e9
font_02_sfnt_off0000a8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F8 18608 bytes
SHA-256: 4b4751a311328005950e34f029346c6528b3e9149d2d82742b8eaa44720bbf68

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