Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7cd717fa30a7fb…

MALICIOUS

PDF

77.3 KB Created: 2021-09-12 19:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 91c8cf99dc0e002bf65560a981065982 SHA-1: 3ad4db8a2decc422b8c6b45fb13ded7ae784e031 SHA-256: 0d7cd717fa30a7fb774503c5d4c6da778913c16ddf936f99d26f78f8decdfd79
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious content. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://wastran.ru/uplcv?utm_term=bicep+muscle+diagram PDF link annotation
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613300930d225---12170397010.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/31234897272.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/68761264354.pdfIn PDF document text
    • https://orrizon.ru/images/file/25485061592.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/nizudixofezabiritoso.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/10347192127.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60767909580.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/21496461979.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/93127337184.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210903_07C9CCB399D37325.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/fajilo.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fbc2314ee---mukusepesadokegob.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/70046515508.pdfIn PDF document text
    • https://architektor.ru/uploads/file/81121109947.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/87962922240.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/pipusepujademezubifasus.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/dojor.pdfIn PDF document text
    • http://receptlap.hu/files/83677215848.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/17299910012.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/xifibakij.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/4647639438.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/31218283337.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_off0000c961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC961 17848 bytes
SHA-256: 911fd2cf3b216c48d4e4e702a374a56e05d4339bee8a0865f247b5d2bfee8ebc
font_01_sfnt_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE9 10688 bytes
SHA-256: 94cb64ffbf00664cb92709456ff3ece48fbff2ed614bb8e0479302b4c6588e22

Open this report in the interactive analyzer, or submit your own file for analysis.