Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a70f66af920ae69…

MALICIOUS

PDF

73.1 KB Created: 2021-02-13 02:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b76d2ed886e17e39df71438949ab4a79 SHA-1: e37d93cb32c6b36db2b65ac3d5ad5e73d6eba06c SHA-256: 4a70f66af920ae6983cf256475abd462e5ea0a952451bed5fcef4c798e4e472f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a domain associated with phishing, disguised as content related to the 'Oxford leadership academy self management'. No scripts were extracted, but the presence of the malicious URL and the phishing lure strongly suggest this document is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=oxford+leadership+academy+self+management PDF link annotation
    • http://bilkaita.space/jerujexoxusoxusulouma7o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443799/normal_6004883c5537b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_5feb1c225a0ca.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/jofoduxazalogi.pdfIn PDF document text
    • http://nasty666.space/photo_mechanic_5_serialmzpp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_5fd6836a8c148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5fd36d760dd1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496853/normal_60121f831965c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459777/normal_5ff60f3ab8c2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikamavidasatam.epizy.com/breakup_party_status.pdfIn PDF document text
    • http://sokagozu.rf.gd/bagudokapofax.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/kozuzejekutarinem.pdfIn PDF document text
    • http://nilikimapineti.epizy.com/humboldt_county_jail_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/evan_almighty_full_movie_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/sozupusaduno.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/kafirurigosuxogod.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/wopiji.pdfIn PDF document text
    • http://josejutolaxof.rf.gd/47091863267.pdfIn PDF document text
    • http://funurebebepoti.epizy.com/manual_shrink_wrap_machine_for_sale.pdfIn PDF document text
    • http://lejamezi.rf.gd/human_drug_metabolism.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE92 5764 bytes
SHA-256: b29ce536067b8d3f53d62ae3b4c3f6b8bd4a45e2ddfe934fb26f9673c7bd3f76
font_01_sfnt_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 11272 bytes
SHA-256: 935d87b375163bd8608b799206ed7489d935e72ab86c953edb7abb05635ac21c

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