Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07b6d410c1e1560…

MALICIOUS

PDF

42.6 KB Created: 2021-05-19 07:06:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9c8ec5721b8809323135ec7718143c18 SHA-1: 20638946e93f90d4b6cd63f00cb4a40110632c73 SHA-256: a07b6d410c1e15607b1a565973a8e11b159fd63431ef163628ccdb3e3acebb4c
182 Risk Score

Malware Insights

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

This PDF document employs a lure of free game items and hacks to entice users. It contains a high number of external links, many pointing to SEO-optimized PDF documents on `bassacctaxservices.com`, suggesting a link farm designed to distribute malicious content or facilitate phishing. The presence of a remote support tool lure further indicates an intent to gain unauthorized access or control.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.xyz/app/479516143/free-minecraft-texture-packs-game-hack PDF link annotation
    • http://bassacctaxservices.com/images/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/easy-robux_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://bassacctaxservices.com/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/roblox-verification_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/free-roblox-shirt-templates-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_003_off00004a75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A75 25784 bytes
SHA-256: 3f095f75c61ad14a4a55059a2ec66ec150891b83520ea7c9226316d6075fbcaf
font_01_sfnt_off00008479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8479 18240 bytes
SHA-256: f1e7a9ae3acfaa3d56f6a9afcdcc307065316a5e3d8814942fd3993c062bfaf5

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