Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f94d9767b9ad99…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 17:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6478efa1cfa72bb682ef9b74c81fe1a2 SHA-1: 8b3267762b0aa2b8806e258ba10c80412f3422c4 SHA-256: 75f94d9767b9ad99806023d7d4b7e1c781e881cb9c5d6b7b8d3e6af02f0c396a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a prominent one pointing to 'jumiwimov.ru'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=quantitative+trading+research+papers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390642/normal_60339472c124b.pdfIn PDF document text
    • http://fbcopyright-center.com/39749246030al5zo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_6043eaa5b7129.pdfIn PDF document text
    • https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/10d23cf8783e9a.pdfIn PDF document text
    • http://kyrgyztours.com/investor_relations_website_template953qh.pdfIn PDF document text
    • https://sixojidolox.weebly.com/uploads/1/3/0/8/130814042/c3eed.pdfIn PDF document text
    • http://numberoone.xyz/livre_orthographe_cm29vslc.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/9086485.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/480615.pdfIn PDF document text
    • http://scarcebook.com/modulus_of_elasticity_of_6061_t6_aluminumxfx1t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5ff3874fa797d.pdfIn PDF document text
    • http://lakcherie.ru/davozulatekonuvesemiduvrod3.pdfIn PDF document text
    • https://kopezemab.weebly.com/uploads/1/3/4/3/134339977/9869083.pdfIn PDF document text
    • http://fb-ig-copyright.com/42050073455q6tn1.pdfIn PDF document text
    • http://lynciguest.com/rebewil3dtdt.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/sizabo/sujabarefawajijoxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72459ace-87a7-4664-bb80-e946f7a9030d/2012_chevy_malibu_led_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d437e2-5c7f-4e94-82b6-01627c0c6b81/mumobosibob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b898f51c-506b-44a9-8d22-ff7d4ef64d6e/soxobedor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b2b2c0-0bf7-42d5-9f6b-6a2de6404e17/how_to_say_1_100_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/new_malayalam_movie_aanandam.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_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 5424 bytes
SHA-256: 1816663b2aa0abf7ec65b30a2384f08cfa4650921eea02cfb9ad8245c0e90f97
font_01_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 10448 bytes
SHA-256: e28ee7a47dcb10a3186f274eae74cd26ca7d2a20772d0874da1cbb56810f8924

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