Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc9eb53c859b3f5…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 16:03:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 03e98dd28cbd7f41b885b334cbeae753 SHA-1: 761757667fa105bc8f8424fe9c31ffa9257b16d5 SHA-256: 3dc9eb53c859b3f52c8a6af9b9dc72fbc15f730b4be45ae0da2a0c8d4b12ce58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary link identified is http://netcdn.tw/app/431946152/roblox-robux-hack-generator-game-hack, which is flagged as a malicious redirector. The document body and numerous other extracted URLs reinforce this theme of luring users with promises of in-game benefits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-robux-hack-generator-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-tons-of-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-and-catalog_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/guuddinfo-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-k-upreme-freestyle-roblox-id_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/claim-gg-free-robux-by-roblox-events_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-how-to-get-elite-game-pass-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/xray-hack_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hype-dance-roblox-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/startingploit-roblox-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-robux-hack-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hack-counter-blox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hacked-prehacks_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-free-play-no-download_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_001_off00002a9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A9E 22996 bytes
SHA-256: ea1459458d9c653480ad0cc1976ff74c74b581dcf5f94ec581d12ba29a312dea
font_01_sfnt_off00005e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1A 18900 bytes
SHA-256: e419110d4009e271ea11aee689c1aa7fe2ca079d33d0815bd6a59eb0f8b0c4e6

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