Malicious PDF — malware analysis report

Static analysis result for SHA-256 56808bb82d5fcb3c…

MALICIOUS

PDF

49.8 KB Created: 2021-06-11 11:10:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a51d30f633e22ff6f74da53ffa10cd73 SHA-1: 5684a88c2b197f8928d797b26d09473436763a51 SHA-256: 56808bb82d5fcb3cd1cac28ddd2877da7e257fd87d836a03e063938866f5eea4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to SEO-optimized PDF files hosted on a suspicious domain, suggesting a link farm designed to attract users searching for game-related cheats or free items. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/how-to-get-minecraft-pe-for-free-game-hack PDF link annotation
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-gift-card-codes-2021-november_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://code.giftcards.comIn 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_off00005975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5975 28196 bytes
SHA-256: e3b9d00fec8059f7385947775d9901afc0cd27b41f9b5d0cb9bcabd6c0196c63
font_01_sfnt_off00009754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9754 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000a0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F4 18028 bytes
SHA-256: 3ed4cc32a3614fc42f77637b5226aac8e96d41a1bdab71d116d218547dfdfc35

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