Malicious PDF — malware analysis report

Static analysis result for SHA-256 7156aa4973a1a21f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 12:10:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7b4ccd261e955298b18c345e102767a3 SHA-1: 44ebba053e740e8bd26857a68ba663f261a920b0 SHA-256: 7156aa4973a1a21f658b10d4553d0ab7438df1c5ef9d055390731bb59c7bc72d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary lure is a link to 'roblox-speed-hack-game-hack', which is hosted on known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely as part of a phishing campaign.

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.tw/app/431946152/roblox-speed-hack-game-hack In PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-obc-codes-roblox_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-verification-no-email_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-movie-websites-tiktok_GM835599320.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-wing_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-promo-codes-2021-list_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/hack-app-for-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-eady_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/car-sim-free-code-roblox_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-is-it-free-to-play_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-dll-cheats_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-pet-snacks-coin-master_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_off00002f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F80 22720 bytes
SHA-256: d18390baa60cc04965c25affe7e99528b6ac04431239505b4aab734f9011ace5
font_01_sfnt_off000062a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A3 19008 bytes
SHA-256: 0d35cfadd0fca3b252b73fcf83046c0556c80fc1b3ae89449d52291489f63b0a

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