Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce679f584e16b010…

MALICIOUS

PDF

72.2 KB Created: 2021-03-29 06:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8f56c91b6354bfbd34979823d29f602a SHA-1: 2e7e9d55536776f1528847da6c3b15add0bca512 SHA-256: ce679f584e16b010f00063083baff2d047b115f941a544d1485ef60841fd88b5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=what+is+subjective+point+of+view+in+english PDF link annotation
    • https://kenojulovananav.weebly.com/uploads/1/3/4/0/134016885/1dc553bbe4f.pdfIn PDF document text
    • http://realwockyc.info/48211396632ff16o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fe964e25c18d.pdfIn PDF document text
    • http://lnstagramcentre.net/lisupopisavifinenezonioq0t0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407747/normal_5ff7c1110c52e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_605bf0b24c5b6.pdfIn PDF document text
    • https://garujidizog.weebly.com/uploads/1/3/1/3/131398488/pepupu-xegowanevuz-dodevepojemut.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/fupirifojiribu.pdfIn PDF document text
    • http://spainwow.pro/the_standard_hotel_closingpg412.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/kyocera_printer_drivers_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409604/normal_5ff4c730bebfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fcf362c8184f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407303/normal_5fc772c47ae4c.pdfIn PDF document text
    • http://bigops.fun/mudavikanajotos82ep2.pdfIn PDF document text
    • http://art-practice.org/734up5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/affairscloud_feb_2020.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/7869057597.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_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 5564 bytes
SHA-256: 88afa56a39b8b39cf6020666fcb717d83fc5baff91e535001f8eb47b02fe5bb4
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 10796 bytes
SHA-256: 17baf6255800edbc8fc68a80af6813a5b4ce29f30790eb31c4ff839ef79641d3

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