Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeeae29fd04fabe3…

MALICIOUS

PDF

84.9 KB Created: 2021-10-05 03:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4349fbefdec20386dfb3bee8ccdc3be3 SHA-1: c9740ca41637ff6cd89e3f9f6f5cc37b43550022 SHA-256: aeeae29fd04fabe3f1a16ce7a2a37d1ec23c99cf4bc9b42af2562bf3a72d3f9b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=committal+to+the+grave PDF link annotation
    • http://grandviewgroupresort.com/upload/files/gedijemanedaguvipetol.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/baxises.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/7767a86557b89bb8798730983f951b87/62319479028.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202109261320041060.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/57640883450.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/xasimupawov.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-26/20210926183505445730.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/96237279980.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/muxuwerewam.pdfIn PDF document text
    • http://balalajka.nu/media/sutiwadubexavalokogalo.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/60299408320.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/kuzerozijifadagiv.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/040150002140.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/55433330612.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/84642465588.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1630845255kajubupu.pdfIn PDF document text
    • http://drdj.friend-match.com/upload/files/dexemifovipefaf.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/80673417742.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/wiwelevetewipavel.pdfIn PDF document text
    • https://apelhijau.com/contents/files/95395556234.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/mobene.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/4945e1a197dc03bfbdab1aa32b68a535/kikudodoxumijadedotug.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_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 10380 bytes
SHA-256: 18c9d93184436aa8a8db906f636c6d037813b25278aa8d66c5fd1a722e2316bd
font_01_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 19172 bytes
SHA-256: ff4777dfb89d766b3598f62b6d59b6ba4cb632e8a31b0952a809f3aaf4126166
font_02_sfnt_off00012e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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