Malicious PDF — malware analysis report

Static analysis result for SHA-256 2869ce1853262f6e…

MALICIOUS

PDF

91.8 KB Created: 2021-06-06 21:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c5e056bba9b0064fdc2973753d22db89 SHA-1: 6baa8fa104eb903ce74c7de1cf108726dce682ef SHA-256: 2869ce1853262f6e394678fff990fe709f83057a209b79149247df3c88522527
126 Risk Score

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 0.9996

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://gimoguvi.ru/123?utm_term=abc+song+violin+sheet+music PDF link annotation
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/saxoregilixekam-tukew-derozamuje-setes.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/nugafen-vupikizogupoz-rosegom-keruripimuwu.pdfIn PDF document text
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/funaregegamisi-tatenegijoxezux-danevolijolit-raderoge.pdfIn PDF document text
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/73dc331f.pdfIn PDF document text
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/zopubevaboze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojifot.pbworks.com/f/kobugo.pdfIn PDF document text
    • http://nozobitativi.pbworks.com/f/earn_to_die_2_hacked_apk_download.pdfIn PDF document text
    • http://gafuxexosaru.pbworks.com/w/file/fetch/144544917/34987996689.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144556293/25118586531.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/w/file/fetch/144532419/developing_person_through_childhood_and_adolescence_eleventh_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7b5bdd-0871-42c8-8958-8746228b0d1b/zaxabozegax.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/f/rujemow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d990d9-bda3-42ac-827a-7a0aee231120/jibobiwomomodin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b90ff83-4ac5-4a7a-99c4-97cb5022958b/29438687242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4b0db8-516a-4d3c-bf6a-b6fbb1d15205/ruxososupiwagexoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4bf37a-578d-44d8-95e6-b8777c7e80c3/kotutewazukabir.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/w/file/fetch/144484323/download_supersu_zip_file_for_android.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/14702930487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e528a0f7-f6b8-4803-9aed-da5c2ceb5e23/cast_of_sarah_plain_and_tall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8b5080-4230-4b86-824d-92af4ed5fd65/numerical_recipes_fortran.pdfIn PDF document text
    • http://gajufabeke.pbworks.com/w/file/fetch/144412725/watch_spider_man_far_from_home_free_stream.pdfIn PDF document text
    • http://bazibenis.pbworks.com/f/balloon_twisting_instructions_for_beginners.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_off000126b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B2 5096 bytes
SHA-256: 4e217602497f69df65ed3ff47bf6453f54d8154635fa72bd602d295a5f51a6ef
font_01_sfnt_off000137f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F1 11928 bytes
SHA-256: 1bbf195c104e4b6b04ed3e53dc4e371242c200bf3f0eac4486ac6bd32554193f