Malicious PDF — malware analysis report

Static analysis result for SHA-256 569797510c90595b…

MALICIOUS

PDF

74.1 KB Created: 2021-02-14 23:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c82dedbe3dcbaf48ce7a68a08f4266ce SHA-1: a62ec4965b23405f68420b83f1059e6f72102c8f SHA-256: 569797510c90595ba0802c87dc4b82a414ed9c6d38e9516904d5d8dc3c283d21
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/aws?utm_term=haematology+case+reports PDF link annotation
    • https://tixuxajus.weebly.com/uploads/1/3/2/6/132682254/vewewuru_zanojidililu_jasurogekif_lusefalodigu.pdfIn PDF document text
    • http://gajikabe.iblogger.org/newite.pdfIn PDF document text
    • http://fepafotejidug.iblogger.org/the_satanic_bible_malayalam.pdfIn PDF document text
    • http://bisikar.22web.org/jikuketilomavusob.pdfIn PDF document text
    • http://stixlife.info/41151921398ynvcx.pdfIn PDF document text
    • http://koprovk.xyz/nj_jury_duty_reporting_mercer_countyitz8s.pdfIn PDF document text
    • http://jatamonip.iblogger.org/crack_software_websites_list.pdfIn PDF document text
    • http://wukixijolori.iblogger.org/im-_1270_battery_datasheet.pdfIn PDF document text
    • https://xojakonokixamu.weebly.com/uploads/1/3/1/1/131164577/970459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merapuw.epizy.com/irrelevant_sentences_in_paragraphs_worksheet.pdfIn PDF document text
    • http://xetitonaj.rf.gd/zapolifagolifebexosapi.pdfIn PDF document text
    • http://relimimukavewuj.rf.gd/dowilozujebokitore.pdfIn PDF document text
    • http://wuzuvulas.epizy.com/kaspersky_battery_life_saver_booster_apkpure.pdfIn PDF document text
    • http://keximidurowu.rf.gd/94875117429.pdfIn PDF document text
    • http://mekidojakad.rf.gd/4060544107.pdfIn PDF document text
    • http://gidimuni.epizy.com/bopotejukenigusogitetop.pdfIn PDF document text
    • http://tuninedup.epizy.com/time_conjunctions_worksheet_year_2.pdfIn PDF document text
    • http://worurekebisur.rf.gd/bitonic_sorting_network.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_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 5316 bytes
SHA-256: bc0c13601c4307aba30a8efd0f7c4fa056f2b49d6ad8d257db49ded51d6f5d41
font_01_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 10108 bytes
SHA-256: 4ec2c6b79d214d681a771482740b5288f3502cc76fe5ea3337d79465b5c5279a

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