Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b09b2a30df8abb…

MALICIOUS

PDF

71.2 KB Created: 2021-09-10 00:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 317414aa539762a324027f2638f2dbb1 SHA-1: 79eb4d107f05d4ee47268708039b4cd0f1462b05 SHA-256: b5b09b2a30df8abbe874fc70b48b259e5eb61d5a0c0e10c4846cba8ca444ecf2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or are structured as link farms, a common tactic for phishing or distributing further malware. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mahae.hu/files/files/14640197446.pdf In PDF document text
    • http://hyunshin.net/userfiles/file/mujowutasowadulosenawu.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/51408914711.pdfIn PDF document text
    • https://davaocarrental.com/images/file/92614601568.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/mufikozoralojeboregazen.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/runutaf.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/72908976126.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/40050749859.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/foteril.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/nizivoretog.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/95724898562.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a774152265---vifelabapufuwega.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/98474631071.pdfIn PDF document text
    • http://dd-eng.com/files/files/vugivafetuz.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/fudonebe.pdfIn PDF document text
    • https://ratodua.com/contents/files/pogizuxetaxu.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/jawisewalaxas.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/48325675395.pdfIn PDF document text
    • http://bulmarconsult.com/files/xafilapu.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210906_CA7658F5FCFD4962.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/lapitozoxezoxonuburupag.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/57640179678.pdfIn PDF document text
    • https://hgb.se/filer/file/40728277742.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/49769898074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=robux+card+codes+not+usedPDF 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_off0000b642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB642 10612 bytes
SHA-256: 7ff6f63fffde0e0d7d099b3e964cc807056d73a2bd317b864f161ed76cc9a20c
font_01_sfnt_off0000cebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 16136 bytes
SHA-256: bcc82f8f7a60768e1cfc910cdb5d6f3435f0837e27bd8ac8f961c6f2a3c28257

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