Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b49f49cdfd62622…

MALICIOUS

PDF

33.8 KB Created: 2021-06-27 08:35:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0e607276ae52688aebd5a01e9a3e35c2 SHA-1: 5683bbe59e3b7e61f00238239e166d236a131a59 SHA-256: 7b49f49cdfd62622fa343b8628584f373b540ba305335ca0fc8d21638cc9e81d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are identified as malicious redirectors, specifically luring users with promises of free game currency or hacks. The document body and heuristic firings confirm the intent to redirect users to potentially harmful content, likely for malware distribution or further phishing. No scripts were extracted, but the presence of malicious links is sufficient evidence of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-robux-no-password-game-hack In PDF document text
    • http://kfz-werkstatt-etp.de/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/dlls-for-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-robux-giftcard-generator_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/robux-miner_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/stop-it-slender-roblox-code-for-free-outfit_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/hack-with-player-command-roblox_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-hack-https-coinms-net_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_off00002e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E16 21860 bytes
SHA-256: 460793180427bb41f62c42954dc364091f80f80f43669e2e3e4ea5496ee04561
font_01_sfnt_off00005e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 19208 bytes
SHA-256: 6b3d0efb3debf488fe81ea92b60c01ccbae5249fd0a29fdced25ee5be01c6081

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