Malicious PDF — malware analysis report

Static analysis result for SHA-256 92883fc159acc38e…

MALICIOUS

PDF

77.6 KB Created: 2021-03-24 11:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3890a99b6ee4898e4ca45f63ac23cd9b SHA-1: 3ad35236b80c657ac83a59b3862e72fa8bbb6b40 SHA-256: 92883fc159acc38e76239ed041c6b1eb2a78e8da468d7c1283a0570ecbcae1a0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it's part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. The primary malicious URL identified is https://lozipotod.ru/123?utm_term=politically+incorrect+guide+to+western+civilization.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=politically+incorrect+guide+to+western+civilization
    • https://cdn-cms.f-static.net/uploads/4414860/normal_6010463849809.pdf
    • https://domirirezup.weebly.com/uploads/1/3/5/3/135382932/niguwizaj.pdf
    • http://xavedevub.iblogger.org/karugomikiw.pdf
    • https://static.s123-cdn-static.com/uploads/4401694/normal_60046ae0df9a8.pdf
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/wupizolijapotekemo.pdf
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/ziwuzeluloripow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_dbba6e79b55048c7b6d356d2d4330aed.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b600c62-98eb-4113-9afd-10c7758d0aca/what_subjects_do_you_need_to_study_public_administration.pdf
    • http://xegunapajom.epizy.com/30060767031.pdf
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_38915c7f2c3346d5baa11969ba030806.pdf?index=true
    • https://uploads.strikinglycdn.com/files/436fe4b0-cc22-49f4-bd6a-a6a6509ac773/57783680081.pdf
    • https://uploads.strikinglycdn.com/files/3c9b293a-043b-48e5-bc6d-baeba2475f6b/news_reporting_and_writing_11th_edition.pdf
    • https://uploads.strikinglycdn.com/files/d891a150-53d6-48ea-a043-1507312530c6/samsung_dvd_c500_blu_ray_release_date.pdf
    • https://uploads.strikinglycdn.com/files/b5d82955-bd98-439f-99a1-245bd5a1a9e4/cual_es_el_proceso_de_investigacion_cuantitativa.pdf
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_b6c34f3ed5ad47d499f94f88361897e9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e7b345b8-fdfa-4b17-b21f-88a8f53c1e64/13489291181.pdf
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_431fcf595d2842fdb8190c0b5c121b2a.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_off0000f011.bin
ac66f9c91f2f0716fc6b4691717ad9368fb314b36f60424f0a57df1cda807def		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 5412 bytes
font_01_sfnt_off000102ad.bin
c542f9f84566af5cf47ec4a96738488e14af298f362c590629d5a7cee1031692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 11208 bytes

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