Malicious PDF — malware analysis report

Static analysis result for SHA-256 d980be1a1379ccdf…

MALICIOUS

PDF

76.1 KB Created: 2021-05-14 20:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 20af425cc7c6223d38a588bbc4a63900 SHA-1: 223b089791279a50b1ee0b16746919913ffc0bd8 SHA-256: d980be1a1379ccdf8b1f5422e1d70051eee419fd0ff16ffefbc646048f3bc0bd
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 external URIs, with a primary focus on directing users to a URL that appears to be part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

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://jacksth.ru/strik?utm_term=belkin+netcam+hd+setup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479441/normal_601d7cb760996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5febc263e7bac.pdfIn PDF document text
    • http://tumbaa.space/254990545044qcme.pdfIn PDF document text
    • http://custits.space/1967379087ccrmx.pdfIn PDF document text
    • http://honey-love.ru/kimebutowamibii5gr3.pdfIn PDF document text
    • http://ubsvp.com/lausanne_2020_alpine_resultsf1yic.pdfIn PDF document text
    • http://peludofnor.fun/uphill_rush_water_park_racing_hack_apk_downloadx29bl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fe08dd508ed7.pdfIn PDF document text
    • http://mibotirekusiw.mywebcommunity.org/agile_web_development_with_rails_5_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5fe8b8d5b3df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_603ce8637d968.pdfIn PDF document text
    • http://sunshop.pro/314436763783ewli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445340/normal_6067bd50ebef0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuparibuju.atwebpages.com/immune_response_to_viral_infection.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/bitter_almonds_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/sc_driver_license_renewal_fee_california.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/sony_action_cam_hdr-as200v_accessories.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/what_is_the_oldest_greek_myth.pdfIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/ratiridim.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/nitrous_oxide_sedation_guidelines.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/bajatejagodomo.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_off0000ead8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 5328 bytes
SHA-256: 19b00eb6ec62c4f9b4ec04aa40fccb5f0401b76dd5168341d1b86e1aea66344f
font_01_sfnt_off0000fcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD6 11252 bytes
SHA-256: 1fe598c73b472cdf03ab1d826d7e91379f2644cd489a2d59112bdca472fe4275

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