Malicious PDF — malware analysis report

Static analysis result for SHA-256 3805ae4b521128c3…

MALICIOUS

PDF

86.6 KB Created: 2021-05-09 08:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b8fef2207011043a0ebe10c780fc1e03 SHA-1: 20cc7b4934c5e07a383ad6316bd53ff89b563619 SHA-256: 3805ae4b521128c3dc96d470521f69b084d576b1fe1fbf1f89979ab1dfc04d8c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Macbeth', likely intended to trick users into visiting the primary malicious URL for phishing or to download a secondary payload. No scripts were extracted, but the PDF structure and URL heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=what+happened+in+act+5+scene+2+of+macbeth PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490371/normal_601458bf0f246.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/iIpx5fu/super_car_racing_multiplayer_uptodown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469358/normal_6036ccee2de84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_60410f2b2e92f.pdfIn PDF document text
    • http://zexinebizo.22web.org/video_chewing_gum_nct_dream.pdfIn PDF document text
    • http://xadukododefisev.22web.org/linenekemudojod.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/fOBCoid/voxut.pdfIn PDF document text
    • http://doguzunagenuxo.22web.org/vutugoxobikagivesijirof.pdfIn PDF document text
    • http://luxenerox.22web.org/97640521230.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/jOgftga/amazon_seller_central_uk_contact_us.pdfIn PDF document text
    • https://cdn.sqhk.co/naxopesareg/Sy38P8r/zikonixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_60051216319eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_60518e9798963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://durunorutap.epizy.com/soft_warm_white_led_christmas_lights.pdfIn PDF document text
    • http://solijolubijot.epizy.com/kabodogavilig.pdfIn PDF document text
    • http://xivobotaxonid.epizy.com/fdmr_bhai_name_ringtone.pdfIn PDF document text
    • http://vebezifo.rf.gd/collins_english_for_business_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea19c00b-a4ea-449e-8a17-19079a218c47/danshui_plant_no._2.pdfIn PDF document text
    • http://loluwoje.epizy.com/basin_street_blues_lead_sheet.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/informaes_sobre_o_cultivo_comunitrio_do_arroz_na_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2839f68-2f5d-4dc7-b416-9717772dae82/briggs_and_stratton_28m707.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 5464 bytes
SHA-256: 39e84e4b367db9aed14abcdc0756a352557932aa4b2e92520ac1b452f6a0310d
font_01_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 11288 bytes
SHA-256: b3ea7cc4f17e9d954b2977f632df3be7db6d1e4adbece18d8020ae7f15fbd9e1
font_02_sfnt_off000129b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B6 16104 bytes
SHA-256: e55875cdf85fb13d043b292e8b8f3614dea4d448d0d8500cbb1c82a5ad91d8d5
font_03_sfnt_off00013e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E87 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333