Malicious PDF — malware analysis report

Static analysis result for SHA-256 758f25a50ecb86f0…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 09:32:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7b6e6d4407d3ad3b016ab66b9b87e98b SHA-1: 6ec417c4b0d43ed0b965f6e51807db0453ed904c SHA-256: 758f25a50ecb86f0ff6e4e76af6a50e62678d11e6625723c99085acf04d658c4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-hack-robux-download-ios-game-hack PDF link annotation
    • http://repository.poliven.ac.id/repository/free-robux-codes-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-tix-on-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/como-hackear-roblox-com-cheat-engine_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/fake-hacker-id-roblox_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/shark-bite-hack-roblox_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-form-ylow_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/pubg-uc-official-app_GM1330123889.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-how-to-get-free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.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_off00002e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1F 22736 bytes
SHA-256: bbcae69ab94ccd008b44cf95561cbe4e8e7113059431d5f27e6f80a53c8a7ccc
font_01_sfnt_off00006113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6113 19304 bytes
SHA-256: 4d8043f2c1e880e0e98806d39907f2f9a276eb384100ad8898f750217f366acb

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