Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6f880979ed1274…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 07:50:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5c3358e5f783305da69737881f96e26f SHA-1: a9cb99f1ce54e440bfa5a3da3d70b4f5d2fda65d SHA-256: 9f6f880979ed1274e055e617f309e4a4294ba1ef365acf53c4476f625b815d7d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links disguised as game hacks and free currency generators, a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO poisoning tactic. The primary URL http://netcdn.co/app/431946152/roblox-teasurenhunt-simulator-hack-game-hack is likely the initial destination for the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-teasurenhunt-simulator-hack-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/how-to-get-2021000-robux-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-promo-codes-february-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-through-walls-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/rblx-gg-tons-of-robux-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spin-coin-master-hack-2021_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_off00002e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E62 22800 bytes
SHA-256: 8f7fb2265465bc2fdbad42ce9afe1e30c0363de8473fc80e5e3a3343602318be
font_01_sfnt_off00006190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 19444 bytes
SHA-256: 36a54d3d1974a65ea8db30ffb421cb38c1a48dd097fde9b272bb3a231cf9ec8b

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