Malicious PDF — malware analysis report

Static analysis result for SHA-256 533b66947b83acf1…

MALICIOUS

PDF

86.4 KB Created: 2021-02-28 05:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2db146916e442b7f0949906cb3a3752a SHA-1: 2376f65b8b7a47b52d9ee3a83f5556e794ceb7f6 SHA-256: 533b66947b83acf19e57a6f5ef1a467e09419c2272b12ab8f2d35458f581d28f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, suggesting the document is part of a phishing or scam campaign. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=how+to+evaluate+a+liquor+store+business PDF link annotation
    • https://kejarokelevu.weebly.com/uploads/1/3/5/2/135297316/5363390.pdfIn PDF document text
    • http://rejonozafazimut.22web.org/3d_lut_photoshop_cs6_free.pdfIn PDF document text
    • https://tuvajidemagik.weebly.com/uploads/1/3/2/6/132681445/lizejubi_sobupawejikapa_gadevo_vaxuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_60143bf9b04e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_600ee7a9a436e.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/fewetapuwop.pdfIn PDF document text
    • http://dofuluxaruze.22web.org/animated_svg_exporter.pdfIn PDF document text
    • http://bogavevi.22web.org/simple_rent_receipt_template_word.pdfIn PDF document text
    • http://1eyvgo.xyz/12646451132j6udr.pdfIn PDF document text
    • http://shop50off.info/benamakusiwipibotapenikerls55v.pdfIn PDF document text
    • http://vash-komfort5.ru/how_do_you_get_a_stuck_water_filter_out_of_a_whirlpool_refrigeratorvzrtq.pdfIn PDF document text
    • http://itash.space/little_snow_white_brothers_grimm2mldx.pdfIn PDF document text
    • https://tumazalewiguta.weebly.com/uploads/1/3/4/7/134755417/5333503.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/tolewezisusu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sowezenuvafe.epizy.com/black_and_decker_detail_sander_sandpaper.pdfIn PDF document text
    • http://semiwexojexudu.epizy.com/logical_fallacies_in_the_crucible_worksheet.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_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 5060 bytes
SHA-256: 6de3984b36c4d97bc196020444ec57359327b3543f073b157968619d7edb2563
font_01_sfnt_off000127b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B6 10704 bytes
SHA-256: 521962648fe1af32e004512e28ba1a518aa840d223ad4a9c81415db0af5468d4

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