Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b04d572bfc1dd94…

MALICIOUS

PDF

110.3 KB Created: 2021-05-30 21:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1f62e092c460b8f499c01218de0d43d0 SHA-1: df93e78465ef4ea42f6b4fedef015772daec0ec9 SHA-256: 7b04d572bfc1dd94b17b93b79d7a3ec2a22ff8c04533eebec431b2a506ff391c
194 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a large number of external links, indicating a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier strongly suggest this is a phishing or trojan delivery attempt. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jumiwimov.ru/strik?utm_term=what+is+the+second+percy+jackson+movie+called PDF link annotation
    • https://difodofixipa.weebly.com/uploads/1/3/0/8/130814112/ca6dc1f5b6b69d9.pdfIn PDF document text
    • https://vefawotujetebab.weebly.com/uploads/1/3/4/6/134651081/wikeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_601dd3a571995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384649/normal_6000b401266e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_6055c46718644.pdfIn PDF document text
    • https://ximixejolulozo.weebly.com/uploads/1/3/4/3/134351986/6759974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_604f367a664bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489441/normal_606aee659bf9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_6049adf176605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_60372b2878075.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/domilubovilepadig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_60181b236d6ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_601a267aa9f17.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/b88f96bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_60496743d37b4.pdfIn PDF document text
    • https://jipedopifuxo.weebly.com/uploads/1/3/4/0/134042804/1509009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_604f8293dc41c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4480393/normal_60b093939d805.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://uploads.strikinglycdn.com/files/d2463baa-2b8f-4c34-93e0-08490e191e3d/acid-base_neutralization_reactions_worksheet_answers_pogil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336fb534-6867-438c-9386-ef25f941b380/harry_potter_castle_location_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e912f5-1173-4ac1-9ca8-2a3eed067c62/what_is_the_formula_for_average_acceleration_in_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa587f0-9620-4e04-89de-44018f09dcd7/koxesitadusume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210620c6-b8f6-4739-80bf-4ad35581026a/linotewufumogepam.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001408e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1408E 5416 bytes
SHA-256: 6ec66a479f2c9e80d974529eb2f4dd427d234a78bc5170f848411af9f26314fc
font_01_sfnt_off000152ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CE 2232 bytes
SHA-256: 73502ce54843097aec1ae4796e103edd325a50c2b218f10c8a3eecf8b7bd0cbe
font_02_sfnt_off00015d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D13 12552 bytes
SHA-256: 24172581382705ecb1ad025d605dcdd8e355fa09c2d10254e8a02f4e7d00ee07
font_03_sfnt_off000187af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187AF 16120 bytes
SHA-256: 653593fd1d80a85ed6f0165f1aba34eea3860f78c4af0c5284fe4824caf7b9a9
font_04_sfnt_off00019c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C9B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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