Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1685e5ccfed8e19…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 06:59:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b6d55b0b1866b983fb79a143e5d8b419 SHA-1: 712ea43e7dc93492c57d4a41c27f83dcbf9d7e54 SHA-256: e1685e5ccfed8e190d2463cd0308e64b955bfa04d77abc1066c9bf0db7eb2c15
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure appears to be related to Roblox and Coin Master, aiming to trick users into clicking through to potentially malicious sites. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to exploit kits or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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/hacks-for-camping-roblox-game-hack In PDF document text
    • https://www.manmed.info:443/images/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-fly-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/hire-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/skype-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-hack-download-mac_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/cheat-roblox-vehicle-simulator-money_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/hacks-para-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-btools-hack-november-2021_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_off00003012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3012 22740 bytes
SHA-256: 26ed6386ba48dbee2d9b90b02885b0c47969a92a00904e42dc63dbce980a34cb
font_01_sfnt_off0000633e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633E 19188 bytes
SHA-256: df8a7bcfdb20bca79e1c8e792b2c4d13ee9a4211d90831a1d046c88091172a24

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