Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f576700827cd912…

MALICIOUS

PDF

33.8 KB Created: 2021-07-01 23:37:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 36f6f3aab9e8a193f79c8e558c87b266 SHA-1: 61607f887934e8411e87d80a59b8815484507b8b SHA-256: 6f576700827cd9125925927a22127ae95901dcd8f2c48754153416cdaa631249
200 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector hosted on 'netcdn.co', which is flagged as malicious infrastructure. The lure text and embedded URLs suggest a credential phishing attempt related to popular games and services like Roblox and Paypal. The ML classifier also strongly indicated maliciousness.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/ban-hack-roblox-moi-game-hack.
  • 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/ban-hack-roblox-moi-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-fortnite-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/sript-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-rewerds_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pubg-uc-400_GM1330123889.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hacks-for-craftwars_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-comment-avoir-de-largent-facilement-sur-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-20219_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/como-hackear-roblox-con-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-roblox-clothes-boy_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_off00002e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E21 22136 bytes
SHA-256: cb85a30f2f4ac9a9e8484b598bc0da03ad47bf9143c42318a9a023893566afef
font_01_sfnt_off00005f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 18972 bytes
SHA-256: 09c02c1bb4a064d8b3a7f5c2842edc844534f59413ce374103bee3392a474f5a

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