Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79b093a4cdae7aa…

MALICIOUS

PDF

95.2 KB Created: 2021-06-05 15:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fed2da21aca576f21cbffe47c12b8570 SHA-1: 52ec9aff3db21dcee725fa4e6f5b26681c457dc3 SHA-256: d79b093a4cdae7aabc9d250add7267072ab59d826892374cd1ad91d9ea5aa946
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social engineering lure to trick users into installing browser extensions or updates. The embedded URL points to a domain associated with phishing attempts, suggesting a likely attack pattern involving credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://garglob.ru/pbw?utm_term=filemaker+pro+18+installation+instructions PDF link annotation
    • https://wozovogunetip.weebly.com/uploads/1/3/5/3/135396590/4367575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480878/normal_605c69ca2dfa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456660/normal_6061cfc2ca9e7.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/3856862.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/2bfdc6e13c55.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/11325b8117.pdfIn PDF document text
    • https://vowinerini.weebly.com/uploads/1/3/4/3/134385114/6405508.pdfIn PDF document text
    • https://sowubewakojanit.weebly.com/uploads/1/3/4/3/134348505/bekiresot.pdfIn PDF document text
    • https://warubeduzubam.weebly.com/uploads/1/3/5/2/135298611/jiridanu-xevasilu-vunamaj-lisezorulima.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/5250928e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f4dc89-6c5b-4671-8978-56896576c284/30843766559.pdfIn PDF document text
    • http://zorisomofi.pbworks.com/w/file/fetch/144545151/what_is_intercession_prayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0aa95f-24cc-40f6-a1d3-c46e721dfb6f/diagnostico_institucional_definicion_segun_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4930749f-6350-4866-80f4-3f8bfa9a3b1f/united_colors_of_benetton_womens_clothing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01bb8d61-5988-4100-9025-a779bc9ea1e7/82676443374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10827b13-7b36-4cac-9785-e53a580fe5dd/profitable_business_ideas_in_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc09c9a-8a5d-41f9-a691-b6402a54883f/tabasexe.pdfIn PDF document text
    • http://nitezug.pbworks.com/w/file/fetch/144493839/3053638412.pdfIn PDF document text
    • http://silasofinat.pbworks.com/w/file/fetch/144476721/xuzobikebesizagobep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03e392f-a09e-4729-ac2a-30dbb186798e/ssc_stenographer_question_paper_2020_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E6 2912 bytes
SHA-256: 1dc4d53cc543180180c31573cc7ff31d5166e80dfe0f7d334e321c19e224dfc4
font_01_sfnt_off00013341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13341 5344 bytes
SHA-256: c6aa46b37e58a50d055a888e9a4ace352c8fa07bb3dbcf2eee5282cbcb8891e1
font_02_sfnt_off00014562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14562 12084 bytes
SHA-256: 5e160c9aa2bb77a0305648cd79891cc931f8f6354b409f5056d30cdff3386a2a