Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc5c037396c92a6…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 02:47:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b8971ba81ecf9506801e44c0d1a61f18 SHA-1: bca3e04d238ab6ea328dcf43d1937aa682350fcf SHA-256: cbc5c037396c92a69198edae3900a2a01aa9c6bacb214e130e74a983ddbea842
142 Risk Score

Malware Insights

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

The PDF document contains lures for game hacks and free currency, directing users to external URLs. It also features a link farm with numerous PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the presence of external links suggests a phishing or scamming attempt.

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.tw/app/406889139/free-gold-cards-in-coin-master-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/where-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-9db_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-bloxbux-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-you-hack-roblox_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_off000032de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DE 22592 bytes
SHA-256: 62e6bf4665bd649d7e135c31dbde847d3c780fbfa466d125dd4caf44046eed1c
font_01_sfnt_off00006542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6542 18244 bytes
SHA-256: 195128aa3723aff8a9f36dc7538423252c9f71b41e31ba71a2b9093fe1fc8e71

Open this report in the interactive analyzer, or submit your own file for analysis.