Malicious PDF — malware analysis report

Static analysis result for SHA-256 340ae928a6379ed9…

MALICIOUS

PDF

75.7 KB Created: 2021-05-15 13:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e70d122693def991c91c385afcaf3534 SHA-1: 757b1fc4b55486def22afce2b63c6ba4857d14fc SHA-256: 340ae928a6379ed93b62080862da7f3cfa32f7c06e6412c6fdee86a3b899cb8b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of multiple external URIs and a link farm heuristic points towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=continuidad+de+los+parques+resumen+brainly PDF link annotation
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/kibarawawet-neporazozizu-lopozela.pdfIn PDF document text
    • https://rogakaroguw.weebly.com/uploads/1/3/4/5/134517982/8457177.pdfIn PDF document text
    • http://itasummer.fun/best_customer_service_interview_questions_and_answerskfxbz.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/73365819614.pdfIn PDF document text
    • http://my-favshop.online/60701224708umnta.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/49fedf452624fad.pdfIn PDF document text
    • http://momsmall.space/how_do_you_program_a_directv_remote_to_tvpolmc.pdfIn PDF document text
    • http://kodutizaga.mywebcommunity.org/pdf_ausfllen_und_speichern_freeware.pdfIn PDF document text
    • http://extrameets.fun/how_to_replace_broken_french_door_glassp6rfi.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/nonud.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/5369250.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/e1b6efb0-4821-4ef9-aec7-c364cdc35fbc/51562598848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4839cd-680c-4005-9038-e465418f2b79/22292118022.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_2355c011799648f5928f6c2e1382dd86.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca408482-d565-45a3-8c23-92a48ec4325a/tamil_love_story_movies_list_2016.pdfIn PDF document text
    • https://507f79ed-2408-4027-b124-45ed49bded7d.filesusr.com/ugd/2de61b_ca71c586e17742f088801ec31ca8591e.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_115e2e0c3bd84416a278bfa34988f78a.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_a23c50d4d0da4eb998be14e5cbd7bc99.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea592b0-ae44-4673-96d8-d879e162e85b/waste_king_8000tc_parts.pdfIn PDF document text
    • https://9e1bd277-069e-4713-bdcc-1ab96cf790c3.filesusr.com/ugd/5fd2af_b5bb4566488d446c88d0cb74545ea784.pdf?index=trueIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_abd1f4917efa46699e15b13136fc2c96.pdf?index=trueIn PDF document text
    • https://cd5075e9-4951-46bd-8d13-413fdd501c9b.filesusr.com/ugd/eceaf1_7b381b0b7a4349c389dbeb0fe83eb6a4.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_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 5376 bytes
SHA-256: d8eaa2c43a7cb8a8108942f62c57d0306d59379896d7a9ea9ae4883379789831
font_01_sfnt_off0000f957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 11740 bytes
SHA-256: 8652b33dea09fb7e959c37b8ad71c0dfb0afd04bfce3238833c1a37cb51b1f7a