Malicious PDF — malware analysis report

Static analysis result for SHA-256 2237d68612c69dd5…

MALICIOUS

PDF

73.7 KB Created: 2021-04-11 04:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 55f8cdaac8464ff17fd4a5c36da28f0a SHA-1: d628cca63d7e3d5c9a5510983c4860c69fa7b345 SHA-256: 2237d68612c69dd5e9fcf85082a71969777a68e24200dd7d60448cfe9fb3a136
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to a 'prayer for the betrayed wife' and includes a high-risk heuristic for an SEO redirector link. This link, 'https://bologen.ru/strik?utm_term=prayer+for+the+betrayed+wife', is identified as the primary IOC. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/strik?utm_term=prayer+for+the+betrayed+wife PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403948/normal_5fd95d41f08f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_600a470edf645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452373/normal_60420799ac544.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5ff7c626a6c5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_fb70b24ba1c54cb48b9beb4eab2f42ca.pdf?index=trueIn PDF document text
    • https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_691416d8403c4ae8a4179510a0640f40.pdf?index=trueIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_a02ba8cc222242f789b6b0453ab838c2.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_47fc8400d3624b81bbcddad4c51e2318.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_80d65986f48845f791f8bcd094a0239a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuzo/jotuku.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/tarugiju.pdfIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_931edb01afea493d8ae368ca66d61000.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_66df91b6f5ea4b9cbe9fe67d1ef754de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/rojurubewumasafowu.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/microsoft_word_business_portfolio_template.pdfIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_62692be5df6b44978e386c1561160ec7.pdf?index=trueIn PDF document text
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_00e83adc213446e0b88d0d8f86ac5c82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/32631877529.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/fractions_of_amounts_year_4_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/how_to_do_template_analysis.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_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 5120 bytes
SHA-256: c426a8636a0b7af6a25851f70930771026f93c3499e04381587ce90075bd270c
font_01_sfnt_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 10108 bytes
SHA-256: 132d01313ad56a4b889cc0fbc5805bdb0da3a48cc844c64973ec51c1cdb41334

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