Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4a62e7e3bc0d46…

MALICIOUS

PDF

48.1 KB Created: 2021-06-04 02:08:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 77cff187fc21a34fa2ca77a3cbe53f50 SHA-1: b67fcaae4ec649c12bfd42c434043fd5bd0071fd SHA-256: 5a4a62e7e3bc0d46c5b8b7e4d0d71236aeed45e02073e32b2f2822e0bc902ee6
220 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites, including a known malicious redirector. The links are disguised as lures for game hacks and generators, such as 'Roblox Com Free Play'. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://netcdn.online/app/431946152/roblox-com-free-play-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pokemon-go-joystick-free-download_GM1094591345.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-tiktok-followers-quick_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D94 27200 bytes
SHA-256: 7287bb7b3daebf8bd13b372598eb90837a3f44b114eebc0fec1d062e2203a89a
font_01_sfnt_off00008afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFE 3668 bytes
SHA-256: aba5b9bb43d344ee31ddb8a4bebe37f829895f12069103f3f00790c0d90d40ab
font_02_sfnt_off000097bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BD 18768 bytes
SHA-256: 7c9f64eaea5568b736ad355280abdaf35d8ff6f0dd4e48eccbcd06caf7914db9

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