Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdcf8b832a0c38f…

MALICIOUS

PDF

74.1 KB Created: 2021-03-15 05:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0829e93d743dfd819604536460a956e4 SHA-1: 979e8f518c4df5b7f69bb37617bf7f90d832b16f SHA-256: dfdcf8b832a0c38f1da4932123ffb3d9425c14736be2ba424d3e346ac6e894ef
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=snc2d+curved+mirror+worksheets PDF link annotation
    • http://jepegupunu.mygamesonline.org/33215333862.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/what_is_the_average_oxygen_level_for_someone_with_copd.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/shrimad_bhagwat_gita_in_odia.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/android_emojis_vs_iphone_emojispw83z.pdfIn PDF document text
    • http://xagixowedobosab.medianewsonline.com/assinatura_digital_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_601dd679780f5.pdfIn PDF document text
    • http://vizionsmc.net/saeco_odea_giro_plus_descalingkcahw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401697/normal_5ff52d1a34b57.pdfIn PDF document text
    • http://cosmostil.top/9888772249799g5x.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/how_do_i_connect_my_epson_artisan_835_to_wifi.pdfIn PDF document text
    • http://kawlites.online/6344315587jwgwv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_600b8f4b075b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donijexufenu.onlinewebshop.net/dizosemutezes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af91be5-41ea-40e4-9b8d-ac467e13c3b1/wukogomitupogamen.pdfIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_23d6d23a7fbc41e8902055d603a1411e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/828a7e82-1742-42c6-9229-d3858d5806e9/5189468045.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_e13d38e15a7c4570b21b6a1a4a9ccd76.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/best_continuous_lighting_kit_for_portrait_photography.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_0f4bb9fc86934f46a949870494db4034.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d399955e-aa96-4206-8c58-0e41a363edee/49346036700.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_7342c34b281c4210b66b35accf2b31b5.pdf?index=trueIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/honda_fg110_parts.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_599fa8b250b14214a250bb2832b5f951.pdf?index=trueIn PDF document text
    • http://miganuvag.myartsonline.com/integrate_cosx2_from_0_to_infinity.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 5388 bytes
SHA-256: 6839c06d3324e7150f9776249e54f1be627704e550e05e0958cfa2030e791c69
font_01_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 10928 bytes
SHA-256: 26877596be5cf65af434b5fef60bd820833427ab043fd490847cabaf262628ee

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