Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73d82ee9675c6b0…

MALICIOUS

PDF

80.6 KB Created: 2021-03-20 11:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 214e1a3d37fb350d2e97f7db1b251703 SHA-1: b19940c713945b8fa32fd238188a723ab71a2d10 SHA-256: a73d82ee9675c6b05fdfdf128eb2c1fc5f7b2852f69e24f79aa124887e3bbf5f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=eddystone+packet+format
    • https://cdn.sqhk.co/najuvotuwoz/gfidibp/59303383449.pdf
    • https://cdn-cms.f-static.net/uploads/4365607/normal_601e5a6d18a9f.pdf
    • https://cdn.sqhk.co/rudolikube/dgjgjS7/90446878904.pdf
    • https://cdn.sqhk.co/xujuvotu/egcqzdk/secret_codes_for_samsung_a01.pdf
    • https://cdn-cms.f-static.net/uploads/4466135/normal_600bf0c74b1e3.pdf
    • https://cdn.sqhk.co/sepovili/hgjIibH/blue_book_car_values_united_states.pdf
    • https://cdn-cms.f-static.net/uploads/4481834/normal_602cb1bfa5757.pdf
    • https://cdn-cms.f-static.net/uploads/4487192/normal_60559a7937cba.pdf
    • http://sinisegezududas.iblogger.org/harry_potter_books_designed_by_minalima.pdf
    • http://getubij.66ghz.com/anne_marie_2002_lyrics_mp4.pdf
    • http://dofolamemudowu.22web.org/guia_de_ejercicios_fisica_cbc.pdf
    • http://xagelofitu.22web.org/fugerokes.pdf
    • http://guwizerawefoke.iblogger.org/rufizajotokulu.pdf
    • https://static.s123-cdn-static.com/uploads/4466366/normal_5ffdf0393aa7f.pdf
    • http://lonavipesikebe.iblogger.org/candy_compressor.pdf
    • https://cdn.sqhk.co/sobetevod/hejijjM/free_speaker_booster_app_for_laptop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_75339f09166b4b6683172c802037a302.pdf?index=true
    • http://gulavofi.epizy.com/vojiluregexaf.pdf
    • http://pamixawikisif.epizy.com/53493760963.pdf
    • http://jarexuvi.epizy.com/autodesk_fusion_360_book.pdf
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_5b4515addc8743c39f94fb64cc809a53.pdf?index=true
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_5bdff92a4fca449685b94fb53c40d928.pdf?index=true
    • http://dozipebijegubig.epizy.com/zadujal.pdf
    • http://dabemekos.epizy.com/74660689102.pdf
    • http://mejufupivu.epizy.com/37580155949.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc1c.bin
6a4bf82e038da36e9f91641ef037884043cede7d62ab157f12a20f9d6d4eda76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 5392 bytes
font_01_sfnt_off00010e73.bin
cf91163be5d6d4040515308c3d3870af89be5008a62f8a3471d6e892f727afaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E73 10800 bytes

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