Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4e59e0fe10e25b…

MALICIOUS

PDF

92.5 KB Created: 2021-05-17 19:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13eeb3fc31d7a3c23aeaaa60eec11c59 SHA-1: a482f10b536c13b3cfbfb0f9ed8cfbb86fe7e2c1 SHA-256: fd4e59e0fe10e25bc75731295dccdfdd7cd03a048e96410cb719970ed6cfcbc4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated and likely intended to create a link farm for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/d6a983e2b9c2f.pdf
    • http://zizodoroluxonaf.sportsontheweb.net/sunbeam_heated_blanket_f2_error.pdf
    • https://gavojaxuwutik.weebly.com/uploads/1/3/4/3/134319320/nikelaxibuvol-digizudafo-rejizigivakoxoz-xelusawikupu.pdf
    • http://mozobadijoba.medianewsonline.com/9172127934.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=parts%20of%20speech%20worksheet%20for%20class%208%20cbse
    • https://s3.amazonaws.com/kimone/kitimusafoxuziwanuvopexa.pdf
    • https://s3.amazonaws.com/mejobu/acrobat_reader_9_for_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/92c89cfe-0781-476b-9707-6fa45344bc06/caracteristicas_de_los_personajes_principales_de_sueo_de_una_noche_de_verano.pdf
    • https://uploads.strikinglycdn.com/files/a024569d-c3b6-4738-8d33-59dce8fd49d8/2008_kawasaki_bayou_250_price.pdf
    • https://uploads.strikinglycdn.com/files/8bf7a7e6-8a4d-4eb3-8ec4-0b28bcef02b5/25529668586.pdf
    • http://kepagewav.atwebpages.com/waterpik_cordless_advanced_water_flosser_wp-562.pdf
    • https://uploads.strikinglycdn.com/files/c49b3aa2-47ed-418f-ae1e-04b94e390e44/wazoralowifefu.pdf
    • https://s3.amazonaws.com/xugigabitulu/77838060567.pdf
    • https://uploads.strikinglycdn.com/files/6b3fad39-ea27-4ae8-8cfb-b109a4728ada/60423402789.pdf
    • https://s3.amazonaws.com/nimuwet/knack_2_platinum_trophy_guide.pdf
    • https://uploads.strikinglycdn.com/files/14430170-4b79-4352-8395-16cc57facbce/what_is_knowledge_of_god.pdf
    • http://laxolagodofomug.onlinewebshop.net/49439114465.pdf
    • https://uploads.strikinglycdn.com/files/b01dec95-d658-44b8-b59e-6c09e3cca8ae/dejofuvipokabixowax.pdf
    • https://uploads.strikinglycdn.com/files/68fa39b0-e9fe-4a31-a5f0-42287701882d/my_name_is_red_google_books.pdf
    • https://uploads.strikinglycdn.com/files/84659766-cd02-427f-845b-7cdef3f3f0c9/dell_optiplex_790_memory_capacity.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_off00011ce6.bin
b493b8b1c78424ae5304bfd0d2ff288657b6ecab854a2e01fe3113408e1dd6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE6 5228 bytes
font_01_sfnt_off00012ed1.bin
74c1d080ced501f915628e60dcff184c8c64b48b1795904e962a97eebf0d2fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED1 11664 bytes
font_02_sfnt_off000155f1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155F1 4324 bytes

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