Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dff0db9faa94bad…

MALICIOUS

PDF

51.9 KB Created: 2021-06-10 18:03:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4812ac75bf2738ca4050c02186be5cc9 SHA-1: 8ab8c1fbbfbc96f346fec746bfdfc27d1ed5301b SHA-256: 0dff0db9faa94bad95b4d9b4ed630c60d6a56b6045d2dee69d9a290b3cd3ed10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on domains that appear to be part of a link farm designed to distribute potentially unwanted or malicious content, such as game hacks. One critical heuristic identified a link to known malicious redirector infrastructure, further supporting the malicious nature of the document. The presence of a visual download button suggests an attempt to trick users into clicking through to these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

Heuristics 4

  • 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.tw/app/431946152/cheat-engine-6.3-roblox-apocalypse-rising-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-can-i-get-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-gift-card-roblox-50_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/what-app-do-you-use-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-cheat-in-yin-vs-yang-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/pubg-uc-60_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5279 25628 bytes
SHA-256: 0889a5d79a8e9028394616b1e6b116c98d340374218b6f154bc6613b29e439cd
font_01_sfnt_off00008db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB9 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00009754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9754 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA465 19456 bytes
SHA-256: 6e0b479ba2f21c8acd8584f123f510c9288b9f039a5a55fecbab66daf17b0d45

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