Malicious PDF — malware analysis report

Static analysis result for SHA-256 351e1743941e7ac6…

MALICIOUS

PDF

74.5 KB Created: 2021-03-01 06:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 453554a47034657be8d7a5849d85396b SHA-1: 245ad166bd2eeadbac5f70155d401030242f09ed SHA-256: 351e1743941e7ac6e15c08215ed32d9e298c68610e2637c0fcea1dcc70dcd641
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains text suggesting it is a lure for a website related to 'john grisham books in order 2020'. Several external URIs were extracted, with the primary one being 'https://lozipotod.ru/award?keyword=john+grisham+books+in+order+2020', likely serving as the landing page for a phishing or scam operation. No scripts were extracted from this sample.

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://lozipotod.ru/award?keyword=john+grisham+books+in+order+2020 PDF link annotation
    • http://gimazazutakegi.iblogger.org/do_all_samsung_tvs_have_audio_outputs.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/ehegdjf/45367514129.pdfIn PDF document text
    • http://guburifesujera.22web.org/niwubone.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/hichfjd/78571786428.pdfIn PDF document text
    • http://biwijenanun.22web.org/epic_amplified_minecraft_world_transformation.pdfIn PDF document text
    • https://cdn.sqhk.co/nojumuku/bnhibss/27453287538.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutugujipix.epizy.com/achmea_insurance_annual_report.pdfIn PDF document text
    • http://disupenepoka.epizy.com/bhangi_song_free.pdfIn PDF document text
    • http://wavuwiti.epizy.com/xawoluzenodibazigisu.pdfIn PDF document text
    • http://fukibas.epizy.com/sumaporenusolabadob.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/redifuwutikaken.pdfIn PDF document text
    • http://nanaxaj.rf.gd/les_fleurs_du_mal_resume.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_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 5672 bytes
SHA-256: 723f7f767fabadcf1205ba557cf85b4fd2c105adf16639529d80a24fee5aa192
font_01_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 10484 bytes
SHA-256: ab5ed6313d64d664203a2203f72fde8130c1b9d9e539209aff783da6dc73b188

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