Malicious PDF — malware analysis report

Static analysis result for SHA-256 f720b383ec06b58a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-26 07:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e8aec542de21f1c9f96c5dde10e52e SHA-1: 583e7872bf55ca37fc09f1bf978cea8607d65fb0 SHA-256: f720b383ec06b58a50e1d87166b458dc59acc00619954f7c961b44b3d3a68c14
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm designed to distribute malicious content, specifically identified by ClamAV as Pdf.Phishing.Trojan. The embedded URLs, such as 'https://lozipotod.ru/123?utm_term=omegle+video+apk+free', suggest a phishing or malware distribution lure, likely related to downloading an application. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a malicious intent to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=omegle+video+apk+free
    • http://testrun.ru/sowulowepugito2d8e.pdf
    • http://milansit.space/matthew_hussey_relationship_tipstjyfu.pdf
    • http://ttop-shop.com/lg_tone_pro_760_walmart0ehi1.pdf
    • http://lifeshop.pro/aorus_z370_gaming_3_manualusyz7.pdf
    • http://aazzzry.space/german_b2_vocabulary_list_with_englishl2cep.pdf
    • http://bigmagazin.xyz/does_the_dyson_v7_animal_have_a_hepa_filter3omwh.pdf
    • http://kinoxca.xyz/android_development_tools_adt_bundlemiwvz.pdf
    • http://mazers.fun/647588893449ddhj.pdf
    • http://axecheat5.xyz/naxuzuramafo70oxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ee11e74c-7ca0-47f1-a2df-85a5f4c02e14/what_are_the_rules_for_monopoly_deal.pdf
    • https://uploads.strikinglycdn.com/files/176de26c-7a8b-4d3e-95b8-b7669caedb73/96679336262.pdf
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_097ed75ecdb74a7e80f059eefd12c8bf.pdf?index=true
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_1973aa7de8894cb3a57e9f5364278def.pdf?index=true
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_1e8afa0e85804277a5504147fd990010.pdf?index=true
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_78f1e281d9e744c4a09371b79c45dd24.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fe5d10c5-04cd-4cd0-9e18-fffdcc95bc25/63471156281.pdf
    • https://uploads.strikinglycdn.com/files/42512cf2-9804-47d9-a204-27d642d1c50f/23283607437.pdf
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_9044cfa944ed4dd39e1580b352d05238.pdf?index=true
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_a53dc1da60c04ea5ae6e2bd6c4b2bcb3.pdf?index=true
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_8aa05b7864ab4c8490ae5b39db5835c6.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b1.bin
aa6f8e33df0f670b99a58b622b272db0a2873362b9c6113ca2d5a6b25e62069d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B1 5336 bytes
font_01_sfnt_off0000f7cc.bin
c6d09d39fa1ebfc6378602faa4ec24835e98687012a786d3681e8ee6ad017d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 11700 bytes

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