Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5375b301b0b1f99…

MALICIOUS

PDF

86.6 KB Created: 2021-03-19 23:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4c332ee77c40acfc22d02b293872d4c7 SHA-1: 895453d1637ae68c4f93cfe59dc49d951ddbf778 SHA-256: a5375b301b0b1f996247698c3b1d1eae30a5efa0a65e8ed4fba3911506886a27
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=can+gyms+still+charge+during+covid PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fddc87fc3985.pdfIn PDF document text
    • http://kosixanadiguf.iblogger.org/makunetijolojopolovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497071/normal_6003b3cf1b2ce.pdfIn PDF document text
    • https://zutepojajobemo.weebly.com/uploads/1/3/1/4/131454264/balasaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_5fd91f8ba7dce.pdfIn PDF document text
    • https://gilulunerokife.weebly.com/uploads/1/3/5/2/135296548/ladewozukaka_fevojuresogo_dewapemed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/xefidepobedusepokenafix.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_28e1fdd386034de8a14013f06e59fad1.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_725d33ccf2804fd18e3f85bca746f93b.pdf?index=trueIn PDF document text
    • http://kemiwadosu.rf.gd/39248837614.pdfIn PDF document text
    • http://babematalal.epizy.com/free_html_business_email_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/sobuzijesamivurebubemo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/greek_mythology_word_search_difficult_answers.pdfIn PDF document text
    • http://tojegazanet.rf.gd/steve_harvey_jump.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/cassandra_database_for_windows.pdfIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_86d555d3679e44ebb2e707868cc8e51d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/how_to_get_ordained_in_ohio_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/bowflex_bxt216_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/xizuzujuvidutubo.pdfIn PDF document text
    • http://jizozamom.epizy.com/consumer_protection_act_1986_with_latest_amendments_2020.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001148b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148B 5420 bytes
SHA-256: 1b6780391267b6563d65c8d5caa6f2acde25a43ebe1dec93499b157ccd1b2340
font_01_sfnt_off000126d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 11400 bytes
SHA-256: 3b07fe99b201599344ed74425cdc1b1dab92d632bb369a0501b8b336b1a5cf31

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