Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf593b1dff66a118…

MALICIOUS

PDF

76.7 KB Created: 2021-04-24 06:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c70988123e057f2cbc8b936fc0e574c SHA-1: 5654259ca7fb153bb2b62476068ed9f2eae4ee2a SHA-256: bf593b1dff66a118759e3a3ebbddc32b90f17fd1eee4f9f467f9dd928c3fbc0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of external links, many pointing to Weebly and CDN domains, suggesting a link farm or redirection mechanism. The primary purpose appears to be directing users to potentially malicious external content, rather than delivering a direct exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://botokaw.ru/strik?utm_term=angle+addition+postulate+worksheet+kuta+software
    • https://semuzotefol.weebly.com/uploads/1/3/1/4/131437619/6008220.pdf
    • https://vufuvato.weebly.com/uploads/1/3/4/7/134718288/foluzumomivid-kizevevar.pdf
    • https://vojosapixetogal.weebly.com/uploads/1/3/4/7/134770394/b37650036.pdf
    • https://cdn.sqhk.co/pezolaje/iD2Ziim/76620294024.pdf
    • https://cdn.sqhk.co/modajili/ehijjje/hocus_pocus_costumes_for_adults_uk.pdf
    • https://cdn.sqhk.co/poronujefino/YggBWgi/91844416202.pdf
    • http://siwosupegejolop.medianewsonline.com/baxibegigokexanenaz.pdf
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/577076.pdf
    • https://cdn.sqhk.co/nawovoso/iujddig/bally_s_las_vegas_casino_slot_machines.pdf
    • https://cdn.sqhk.co/tisumusef/e2w4idZ/she_keeps_talking_to_her_ex.pdf
    • https://cdn.sqhk.co/fokapalo/7jchbhc/29689666286.pdf
    • https://kexowepapu.weebly.com/uploads/1/3/2/8/132815076/nafakebenevoxeji.pdf
    • https://cdn.sqhk.co/puxedimuwo/cSCjhhb/jusazunozobosafitireme.pdf
    • https://zazetafulunemu.weebly.com/uploads/1/3/4/5/134599809/4720741.pdf
    • http://zixivudu.getenjoyment.net/lekuvavevuz.pdf
    • https://cdn.sqhk.co/fotenulutis/cQlDooU/highway_bike_simulator_highway.pdf
    • http://zememor.sportsontheweb.net/xofujize.pdf
    • http://rezexepenoma.scienceontheweb.net/metal_gear_solid_2_walkthrough.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/af583427-fbe8-494c-a7c4-ab5ad4b67d88/sony_vaio_operating_system_not_found_fix_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/87d5aa8a-c082-414c-bf6b-ea60fcaf6e77/puduvozutusum.pdf
    • https://uploads.strikinglycdn.com/files/fc6675b8-c017-4dfc-9992-367853e66c62/do_burger_king_have_a_breakfast_menu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39c.bin
ab1633ae8f284df12c47f891c5211cd77b7af580805c609c775fb24717c36b3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 5332 bytes
font_01_sfnt_off0000f5c5.bin
dcaffa35f6dc850254db4fce2be0b65f245e4eacaee5c397fff52c987e01d5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 9824 bytes
font_02_sfnt_off00011715.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11715 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.