Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70ba1de14e9623f…

MALICIOUS

PDF

81.5 KB Created: 2021-02-19 18:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 46de7886dd34ebc762ecaa54c959fb3b SHA-1: 58ee2c2f0c4a44d3b873aa213f779954f98a2002 SHA-256: a70ba1de14e9623fb70c2100a8425f84264d0b57d07220d7d5cb276a7d62144c
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 0.9998

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/wix?keyword=scuba+suit+old PDF link annotation
    • https://cdn.sqhk.co/vemetafije/fN2giZ4/easy_homemade_cake_recipes_without_oven.pdfIn PDF document text
    • http://dmdmassage.com/find_duplicates_in_excel_across_worksheets2wams.pdfIn PDF document text
    • http://boevoenlp.com/xejevuvokelord4cdp.pdfIn PDF document text
    • http://idealicacolumbia.site/vuratiritavofaferivemofn5vuc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401973/normal_5feeede307468.pdfIn PDF document text
    • http://xizunamorazoved.iblogger.org/on_writing_the_college_application_essay_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/Miidy0k/11788215078.pdfIn PDF document text
    • http://nizuvifoko.iblogger.org/drug_and_alcohol_treatment_plan_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_60254c919a54c.pdfIn PDF document text
    • http://unosital.space/fulurokoruranogup2ev2.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/hjidBIx/bts_dynamite_mv_teaser_record.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/Zjfexji/animal_jam_codes_for_sapphires_2020_april.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503214/normal_5fc6b92d09d0e.pdfIn PDF document text
    • http://winoraama.space/5100635431688hhn.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/zuponefi/fonosekekotunubiri.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/metformin_hcl_xr_vs_er.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_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 5080 bytes
SHA-256: 07e77028f0a4ee0f257585966af8525ecd903d769ddeaa1bdc200bf4409c4ca4
font_01_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 10012 bytes
SHA-256: e0e1fda89e4f23f4ccdfac09269a30b226c4327df4d73ac98d5a980d9faa2cb7