Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17ceac0c39e4fd9…

MALICIOUS

PDF

34.3 KB Created: 2021-06-30 03:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 994b551e2f23426d7a6d0201b6ab7438 SHA-1: d3b54d1808af48dde51ddfa6bbde2064b56feea3 SHA-256: e17ceac0c39e4fd9eec4252fae87c37d4cd5134a2a4815260c2fb712c8f912ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'game hack' lure. The document body and heuristics indicate a clear intent to trick users into visiting a URL that likely leads to malware or further phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/reborn-hack-roblox-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/john-doe-roblox-hacker-story_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-shred-money-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-robux-codes-card_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-prison-life-before-it-was-hacked_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-for-roblox-ios_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-promo-codes-roblox-february-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/doungon-quest-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-jailbreak-free-vip-server-link-in-description_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-cracked-client_GM479516143.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
stream_002_off00002f6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F6F 22708 bytes
SHA-256: cc04e61f32446e135468c820f622b1f585e1c4fbc7db972b6cb9b4a118389c61
font_01_sfnt_off00006241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 18656 bytes
SHA-256: 14937ca421eff7fa01d774a4e09aff4b2a97e6447053788e13343ff61b42b776

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