Malicious PDF — malware analysis report

Static analysis result for SHA-256 167bd78e030f3fa5…

MALICIOUS

PDF

70.4 KB Created: 2021-09-30 23:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2ecf766ebd6de19f3f6a376a59c656f1 SHA-1: 03f7e6f7acd1d56fd10e8e8f753321437108820f SHA-256: 167bd78e030f3fa5fc087347586042c9f0156de0d9cbdc9b6d293b2afd6c9d1b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or directing users to further malicious content. No scripts were extracted, but the structure and URL distribution point to a common tactic of using documents to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16154334df052f---5991669119.pdf In PDF document text
    • http://sireny.net/share/files/temamamalelewejipegawa.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/jedajitexalijonapu.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/14330713005.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/rosalajiwekebenoti.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/57431359878.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/23381731089.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16136695dce887---pufunaredujiwezodilamot.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/disunafila.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/91540784029.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/giziligikonaruroxubujov.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/lasasuk.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/tevamiwapex.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/fibivowuxupokesajogug.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/gisexesapifuboxojimewiw.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/gutodaforedozab.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/sexotajomew.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/5976653199.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/jolutadizareg.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/1072414458.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/75928373093.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/34056369682.pdfIn PDF document text
    • https://anjingliar.com/contents/files/xogejejebikoku.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/dubefedulexesanivi.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/81128337661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bloody+roar+2+for+android+downloadPDF 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_off0000b485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB485 15512 bytes
SHA-256: b991f0bfab8edc299b09db36e44e9e2bad0805e50df3bb37a2ea553c122d9171
font_01_sfnt_off0000dc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 10324 bytes
SHA-256: 7b7f4406b2f0d4e3bf660a13e2d2b65eb47d2f4d628be47314c0adb34d287066
font_02_sfnt_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1