Malicious PDF — malware analysis report

Static analysis result for SHA-256 581e8be07ee00be6…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 12:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7c882ca3cff12ea221889102c30f4d82 SHA-1: f221c61de1eeff1c1f5f82007dcffd0189a0c407 SHA-256: 581e8be07ee00be6c5f794474b54615483cce30c1b6487dd395e917129e13043
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://ponafet.ru/123?utm_term=html+template+golang+variable', suggesting a lure to a malicious website. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, indicating it might be a generated document used to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=html+template+golang+variable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494435/normal_60603b62d8810.pdfIn PDF document text
    • https://cdn.sqhk.co/bibikodazit/ffifmpV/2839001630.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/jgR1Ljh/cute_animals_videos_download.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/dhjJyr3/63995492278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_603eec268a5d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_600edc1a34311.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/faSgjha/sesatupu.pdfIn PDF document text
    • http://fly-drive.online/81292203143sxem4.pdfIn PDF document text
    • http://rcasino.info/man_the_unknown_bookcbwlv.pdfIn PDF document text
    • http://ctyr.ru/rise_of_nationalism_in_europe_in_hindi1drjq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366639/normal_5ff66264ee7bb.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/honda_generator_eu2000i_spark_plug_gape438s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_603a664fedcb5.pdfIn PDF document text
    • http://stav-games.ru/195923165306dc5g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/meriwepoveremuzew.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/ruzipowegitarutivonufomax.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/what_to_expect_when_buying_new_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/37599249204.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/gokaxalenupinapubuna.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/will_zelda_ocarina_of_time_be_on_nintendo_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/9201616926.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/firirurivawak.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_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 5124 bytes
SHA-256: 46d0612de16c584f1105d18e906e5f941b790a380bb7af813122b9f4887e558b
font_01_sfnt_off0001136b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136B 10956 bytes
SHA-256: c7c35fe4d9d7557d80cbe00740f8e48140c1cd0e66763119fc4970860ea56553