Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00131856a9110f3…

MALICIOUS

PDF

73.4 KB Created: 2021-05-11 15:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e3867b9e0825a2c814c4eadfee98a03e SHA-1: 9f73340e10e3507c185a222951ee91e315bd968b SHA-256: d00131856a9110f3154d914ba1e479d0b23b05e67a0e86c5a24cc031cb973d34
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 0.9997

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://resalured.ru/strik?utm_term=what+is+a+social+media+investigator PDF link annotation
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/8de908299942c11.pdfIn PDF document text
    • https://kewojifusufiw.weebly.com/uploads/1/3/4/6/134662328/gakekalomubo.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/ziluxugelasizakodadowab.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/tijeradedo.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/hgj2gc9/wikubotijolezasanufatas.pdfIn PDF document text
    • https://wuneregogituweg.weebly.com/uploads/1/3/4/6/134686440/zetojasixo.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/where_does_the_appalachian_trail_start_and_stop.pdfIn PDF document text
    • http://fuvusawomere.22web.org/xasisifekenibosodida.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/5ihZjch/name_generator_for_games_mobile_legends.pdfIn PDF document text
    • https://dakilemuvepin.weebly.com/uploads/1/3/5/9/135963620/16a226368.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/544977723.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/silubebebefuju/how_to_fix_e0_error_on_air_conditioner.pdfIn PDF document text
    • http://zozafiromilofin.epizy.com/barcode_font_excel_2007_free.pdfIn PDF document text
    • http://wunipowozat.rf.gd/tikukip.pdfIn PDF document text
    • http://rozasazi.epizy.com/hipaa_compliant_fax_cover_sheet.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/fabofumenaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/82365289273.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/maykway_curry_powder_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/fegolikox.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/iadt_trauma_guidelines.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_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 5428 bytes
SHA-256: 8d8137a3b9a02fef9f8ab560d8504223e06de4e4a1399a5d15e77475f9960912
font_01_sfnt_off0000f4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C2 10580 bytes
SHA-256: 935d4e18a034a4964c3dd119cecf7b8c44b31e01620f556bb9fa3c21f6894ff3

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