Malicious PDF — malware analysis report

Static analysis result for SHA-256 360e2b91ab7a786e…

MALICIOUS

PDF

95.3 KB Created: 2021-03-16 21:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e022fcc6767f5d75bec4434f7be628cd SHA-1: e74d5b35016983a67a55987984beac9d56abb069 SHA-256: 360e2b91ab7a786e874a41be1eb377a4e58ab04d02d2d4bab34a2d699aecc9af
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a common tactic for distributing malicious content or conducting phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, suggesting it is a phishing or trojan distribution vehicle.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=reading+and+writing+course+outline+deped PDF link annotation
    • https://cdn.sqhk.co/zixajofazadi/jt9n8gj/war_of_the_buttons_movie_online.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/geQzFSO/86679521135.pdfIn PDF document text
    • https://cdn.sqhk.co/zajikeze/dzie2km/21586138162.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://99ca13e2-8bf0-45b2-93fa-bbfb519f101f.filesusr.com/ugd/5392be_702a99eb991c4a8c9da72fc2db13ccf1.pdf?index=trueIn PDF document text
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_de057c635ee5475a9ec161d5ea0021e6.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_b4658560bcab4284b3f94efe3ee5eb2a.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_f555224dbd46442cbca8cc57e8a050aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3ac0bd-2aa6-4d57-ad4e-08aab59ccda3/how_to_enable_flash_plugin_in_chrome_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27b65f4-19ed-4206-8e6b-e006ce237ffb/three_most_interesting_things_about_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27806cd3-4259-4a98-ad7b-6a658ae5558f/2006_chevrolet_malibu_ss_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052ba37e-495a-4349-aff4-19b9e6359359/bejizakugubipinom.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_7754db06009749c48f2657efeb4c743a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/20575d09-3d2a-46db-ae02-8cb21e1cb6ca/lenuxamivegizinabilelox.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_e8235d23a6464353983e27407b1ab279.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_639d85fd60c54952a2a1a24e2e512e2d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e8b438-cd02-4d19-94b7-2e23d5248564/kwikset_z_wave_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383663f5-3584-4c42-aa16-70075d0064a1/12940812305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1418045a-f068-433d-a6d6-b739652e05ff/vujilakivexasupuxaluxa.pdfIn PDF document text
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_3561e06ceea04a9292174ea04ff4237b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 5224 bytes
SHA-256: 0ab79b48c6888e88d8f3b136863056d95fe4dc22bf6be09370e9d155bcee3b99
font_01_sfnt_off00012208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12208 22728 bytes
SHA-256: 7a304a040d002e855bdfe72c1b5ce95c90efc3eae93e4119b849053875f347c7
font_02_sfnt_off00016201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16201 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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