Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fbdfd5a887391f…

MALICIOUS

PDF

79.4 KB Created: 2021-05-12 17:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0fc78a00e7bdda0431b84bbfb47e75f4 SHA-1: df4ec5cdf4dbaecc50c03284835c601e2d457fe3 SHA-256: e2fbdfd5a887391fbbb8eebd317b6ef2c2f336f4568283dfb07ea72cd594a388
186 Risk Score

Malware Insights

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

The PDF document contains a high density of external links pointing to disposable domains, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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.
  • 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://pelibifir.ru/strik?utm_term=how+to+adjust+manual+boost+controller PDF link annotation
    • http://morj.space/tarefim21nu.pdfIn PDF document text
    • http://widawizo.iblogger.org/92660578813.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/81124134251.pdfIn PDF document text
    • http://siruxovilojo.iblogger.org/sadaribow.pdfIn PDF document text
    • http://contact-git.top/whos_afraid_of_virginia_woolf_1966_moviee0iru.pdfIn PDF document text
    • http://musc-media.xyz/31207192356oj976.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/wbcs_anthropology_syllabus_download.pdfIn PDF document text
    • http://esmoney.site/buginidavuvulwlg2.pdfIn PDF document text
    • http://minuduw.22web.org/jasajagajun.pdfIn PDF document text
    • http://mixit.info/aleph_paulo_coelho_review6vhqn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_8d3efb70ddb24cb79630f1d294a3ad37.pdf?index=trueIn PDF document text
    • http://padadubijimesib.epizy.com/checkpoint_firewall_architecture.pdfIn PDF document text
    • https://7162416e-a815-4e2e-b4b4-2f1b6d3d7a1b.filesusr.com/ugd/0723a7_8b4bee1ce899407092cdae06e82e5c9a.pdf?index=trueIn PDF document text
    • https://4228e3e8-6e56-436b-9c2a-5710a6c3a216.filesusr.com/ugd/e32dc8_671a774e73f5488aa6ef54989318c46a.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_724facf2f38444c4be1ad8f98a1eb493.pdf?index=trueIn PDF document text
    • http://sujunutab.atwebpages.com/luwesujakazage.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_9000cbe2a97d48d4be2e17e81bb50951.pdf?index=trueIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_401d08a07bbf4a019a16c407f5574729.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_9806c80d29154fe9a3e7639200e87006.pdf?index=trueIn PDF document text
    • http://zogosugo.onlinewebshop.net/filijefinupojefa.pdfIn PDF document text
    • https://23fe9111-5aa3-4288-b7a4-a84c242bb647.filesusr.com/ugd/d35b85_8d706c161cbd4097b212e26f65d46f9b.pdf?index=trueIn PDF document text
    • https://9329dc78-1a6b-4cc7-98ac-1b36262b7dd5.filesusr.com/ugd/d2be55_be1194bf50154867abb495ec36fb0e34.pdf?index=trueIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_dffd66efef814a95afdee06b90479109.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C6 5356 bytes
SHA-256: bf2f36e527573fc52416751a7f0da630b02f8730eb9e43d0fa3bfd9b999c2654
font_01_sfnt_off00010aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEF 10848 bytes
SHA-256: 35bc2e11159ac66fdc73580bc851b4ab568bdb300da1d196132c83ffcaa1241d