Malicious PDF — malware analysis report

Static analysis result for SHA-256 5239c68be79be616…

MALICIOUS

PDF

74.2 KB Created: 2021-11-13 05:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 379fa1e89288d4b83f7d688c77d5868a SHA-1: dc4e467bd7cab524f633bf992567242f1df11be4 SHA-256: 5239c68be79be616eb74550b450376dfac42610f54b56c1f8a7625552538df54
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to potentially malicious domains, disguised with a lure related to 'kangal livestock guardian dogs for sale'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b276ad7c96---misanogutuvotadusavurek.pdf In PDF document text
    • https://hoangmailogistics.com/asset/site/files/57822054156.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/kawuwuzekijir.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/10347617936.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/41814857548.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161690013298fc---30414038410.pdfIn PDF document text
    • https://lemondedelaura.com/userfiles/file/51746814659.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/jotudemoxe.pdfIn PDF document text
    • http://vodova51-53.cz/files/vinetodugixatuvobezor.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/vogisoxoniwudad.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/9169423385.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/98768782407.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/86276492472.pdfIn PDF document text
    • http://csp.hu/editor_up/vipisodazupamiwutega.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/talisosobigozazenik.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202110271853565309.pdfIn PDF document text
    • https://birudongker.com/contents/files/kurir.pdfIn PDF document text
    • http://huarong-bio.com/upload/files/selurivuzin.pdfIn PDF document text
    • http://netart.hu/userfiles/file/gezuwufan.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20211110105911.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/68866969726.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/84762864635.pdfIn PDF document text
    • http://domosplast.hu/files/file/28064535529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/TSvcnjQ06Jg/uplcv?utm_term=kangal+livestock+guardian+dogs+for+salePDF 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_off0000bbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDB 10900 bytes
SHA-256: 0bd2f868e41d4a139d0573ee0362d99937a62ebc304ef570c7c30fb2dfb9436b
font_01_sfnt_off0000d50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50A 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 18136 bytes
SHA-256: 772b969e7739d970a856bbde0c831f83a4214ee759db64dacb3d23abb2e019e4

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