Malicious PDF — malware analysis report

Static analysis result for SHA-256 73142826691cb9a7…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 16:08:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0b9798fd57a0bacd20e3544d952eb1bb SHA-1: 7b6f7a73f4f8cb565649631a4831241a61191fb0 SHA-256: 73142826691cb9a70e867e0bb3015dbbfa8888085014c207bf06e8dbd1c96828
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/how-to-hack-into-others-peoples-account-on-roblox-game-hack. The document body text and embedded URLs suggest a lure related to game hacks and cheats, aiming to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/how-to-hack-into-others-peoples-account-on-roblox-game-hack In PDF document text
    • https://i-photo7.com/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/da-hood-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/com-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/roblox-mm2-coin-hack-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/claim-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-make-a-easy-hack-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-hack-coin-master-ios-jailbreak_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_off00002da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA5 22500 bytes
SHA-256: 4eafc23bb0c1e6100b7b7e1fd6a7446ffb0a4340147c244b7289c7bc34d5dc16
font_01_sfnt_off00005fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEE 19560 bytes
SHA-256: 171c8e2f60083756fe6857357047122004114756270e3579e275f0e958b8e7e7

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