Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2ed4f2a40d8f18…

MALICIOUS

PDF

82.8 KB Created: 2021-05-11 02:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d25b6d857b042d8b7282a050018be93c SHA-1: 1ca0a823ac9bc69db032ad48356286fcd641274c SHA-256: bd2ed4f2a40d8f180ec6334c21e691e4fa9a202545ee83b2121e57e2d295ae20
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document's content and structure are designed to deceive users into clicking on these malicious links.

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://golowaki.ru/strik?utm_term=new+home+construction+checklist+excel PDF link annotation
    • http://avtoshkola-region26.ru/vuzotefinogafuretotuwasgjdyj.pdfIn PDF document text
    • http://cheatyou.site/40858357513zuc4n.pdfIn PDF document text
    • http://wawesoja.sportsontheweb.net/airline_city_codes.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/polovujajewebekigorasape.pdfIn PDF document text
    • http://everydayy.fun/998522710238lyne.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
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_e2a120b2c0894be4bc8981ddf1907800.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f164890-4a6c-4a2a-9b73-b03575d9e479/how_much_is_a_2_zone_monthly_bus_pass_nj_transit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94156e43-43f8-49db-80f4-abaa136e33c4/rugeperaboxuxudovelidofal.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_7738fada284e4a3c9fd878d14929c390.pdf?index=trueIn PDF document text
    • http://mexoguxeje.rf.gd/no_excuses_brian_tracy_download.pdfIn PDF document text
    • http://bokarorozu.rf.gd/cia_cardiologia_pediatrica.pdfIn PDF document text
    • https://1c0525ad-74e3-41c7-b44a-ab8be2d0a3fb.filesusr.com/ugd/be19e1_791b5437f49b4c10a41b447382ca31a7.pdf?index=trueIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_377d39b23bfa4b649b537b08adc10e64.pdf?index=trueIn PDF document text
    • http://gulavofi.epizy.com/java_8u151_offline_installer.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_36b60a42708742f5ba3fd2141e1bd9e3.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_579fc85fa2b14d66ba28c696c7871f49.pdf?index=trueIn PDF document text
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_4c47df1552be406099ed60813b764606.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d159f69-4ede-4f66-aca1-49a0d256bc07/1200_calories_diet_plan_for_weight_loss_pakistan.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_f03c32b4764341e5ac81ef3aaee32882.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3520de-b077-45e8-a0c8-9b8f2347825d/43819373295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7029594e-a538-42ca-acde-a4bb6bf6269e/dolidafojajulilasive.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_off0000f9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EF 4904 bytes
SHA-256: 847f81906cd66081760df9d4f290aff1282334d60667111b1621fd9895f702f3
font_01_sfnt_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 10884 bytes
SHA-256: b92a27a0094eb3684b0261797b66dba3518039972085617ec62e9f143725c31c
font_02_sfnt_off00012f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F88 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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