Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a43befdaf9e96f…

MALICIOUS

PDF

85.3 KB Created: 2021-09-14 12:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 9d449184eeb777405caddbb2355da0d3 SHA-1: 03dfa27144c4bd07ab1cf8de5164a7b09e596d68 SHA-256: 06a43befdaf9e96fa9aad52e98fe80e78951f08e7ff1d31c8d2aaa95fc3dada5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

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 http://psychologkmalinowska.pl/ckfinder/userfiles/files/78010174167.pdf In PDF document text
    • http://conblocmanado.com/pics/file/27000215278.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64290718748.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/50014259171.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/vuwomubunowozotewosaleve.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/rakefibibezafi.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/93294741892.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/60567683307.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/67161406974.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/tekobovonokejov.pdfIn PDF document text
    • http://vatlieulamnha.com/media/ftp/file/rilokipometomo.pdfIn PDF document text
    • http://it-hair.com/userfiles/75151024025.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/5226810566.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/xejejomakukexivuponugo.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/57609439428.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/38658864584.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/dafalonufor.pdfIn PDF document text
    • http://lovesenergy.nl/file/58774863373.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/vedidizejirafadelowusi.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/vijivivudoxabugum.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/bepetixut.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/zajekofulon.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/87003489930.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/leradebapavowaxer.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210906204813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=android+phone+wifi+passwordPDF link annotation
    • 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_off0000e8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 17832 bytes
SHA-256: 286dc4b62ef6ced2bd51e1ba5b6bc71ede593e3e6dd62065dde44b70c0094a81
font_01_sfnt_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 10516 bytes
SHA-256: 000d9c6a04873296e55d13f08748c11589cdb78b9ef31138c06bd8028b7428e4
font_02_sfnt_off00012f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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