Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7730f048b65e84c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 16:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 412b4e0de4903305b4008499bd64f7d1 SHA-1: 34618d71ebe5f39c993fe2c7890104cacc2619c6 SHA-256: e7730f048b65e84cce1ed3b06e27d2d3c98fcafd8999413475ee406c0d1b15f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. These links likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://miaousland.fr/ckfinder/userfiles/files/mezelafobatabotefavimex.pdf In PDF document text
    • http://artediapharma.com/upload/files/82533098072.pdfIn PDF document text
    • http://identik.hu/editor_up/beliwin.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/dazifufux.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/94533360717.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/mokujaxiramebotaditoduj.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/lodageradedasolu.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/vigogubaw.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109161514334708.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/xitet.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/26358415512.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/82427700004.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403bd302166---28215164905.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/rodipejepanisekimoke.pdfIn PDF document text
    • http://carbonelite.ru/file/dutafososirawolasosavami.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/rirefu.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/98926006760.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/wadefemipezejupudevanun.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/13664389369.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/bapar.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/buwototazomisinu.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/kipetuzejatonuw.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/37240106149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=flight+apk+modPDF 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_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 10404 bytes
SHA-256: 44db244d15b8b3d73fd319e22ae88e5bcc70c565c787de64ae7a245bddb3738f
font_02_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 18204 bytes
SHA-256: 7ef1b53c5cbbd58427b9c0bd8cea87133b72a7dffa479880fb8a9549d2013aa8

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