Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a7557ebf52e6b7…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 09:21:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8a4125bd17fab9b5f00f578acc3cb673 SHA-1: af3c912c77d6b9924ca284b028ffedf9b8862b9f SHA-256: 49a7557ebf52e6b723495733b7b67e37a236a84a555a6d74d4092b6ef8c34435
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are identified as malicious redirectors or part of a link farm. The document body and heuristics indicate a lure for game hacks and generators, aiming to redirect users to potentially harmful content. The presence of multiple PDF links and a critical heuristic for malicious redirectors strongly suggests a phishing or malware distribution attempt.

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/free-roblox-cards-not-used-2021-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-now-gg_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/como-descargar-hack-para-roblox-de-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/do-roblox-admins-get-free-builders-club_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hack-and-glitches-for-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/top-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-gear-into-roblox-games_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/comment-hacker-le-jeu-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spin-link-today-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_off000030a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4 21916 bytes
SHA-256: 27a9a2750f99d06cc6b6a90d921b19f0dcf967726f107ea41c2494c3bac9a7e8
font_01_sfnt_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 19328 bytes
SHA-256: 35594e14dfa24fd523c7ec90490afc62f719862a3bea67312bb207f0c93741a7

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