Malicious PDF — malware analysis report

Static analysis result for SHA-256 2005460f4807693f…

MALICIOUS

PDF

82.6 KB Created: 2021-09-12 00:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e0f1d00db38a6e26782d65f93507a1e SHA-1: 9383749175ea62208b4db9162ba383bdace07d1c SHA-256: 2005460f4807693fa1cba3aae40316349807fff05ed08319c9b37bc0261b327a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm on disposable hosting, indicating a likely attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=mortal+kombat+free+movie+2021 PDF link annotation
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16134dcc89eda5---dopuzaf.pdfIn PDF document text
    • http://baovethanglongmb.com/upload/files/bonomekunokokazomu.pdfIn PDF document text
    • http://kaies.net/upfiles/2109082245404437404yjc6l.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/10155518462.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/mezulamegum.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/wobire.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/pexafetaxunekesewu.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/wijepekixanuvatejopadonuv.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/206215647.pdfIn PDF document text
    • http://licausi.it/userfiles/files/devaxoxosubisutojixaxom.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/nosazigipem.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/88707541861.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/96465777847.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/gejejovujamirajitarag.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/98772979565.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/gewemifokawa.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/natonaritosotozerog.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/757838221.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/fosojudezemaledoguna.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/zajaruta.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/63699981608.pdfIn PDF document text
    • https://equinox-e.com/upload/files/76234215194.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/94892212368.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96975910156.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/rodifubijorifizuwidumejob.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 10688 bytes
SHA-256: 5354d452fe88c397645574a617165486a1ba0d19da113cb2d8e453d3c6fc5992
font_02_sfnt_off00010e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E83 17744 bytes
SHA-256: 4b7734c830465b555198543d3093fe35b1fb62d6fc391fc70f99468bdcab87d4

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