Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8444e9cf0de67a…

MALICIOUS

PDF

77.0 KB Created: 2021-05-18 13:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e7d98dd2100e64e1fa7002e30fe52009 SHA-1: 2cc2b02f9b543fdc3c5f610f0a0b56047ccd32a0 SHA-256: 0f8444e9cf0de67a40743df47936fc68db252b57f95a2199e50acd339e4b7629
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be related to the URL's content, suggesting a lure.

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/strik?utm_term=how+to+put+a+sentence+in+negative+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501775/normal_603a8932032be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456676/normal_5fdd3b63db9d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452171/normal_6050049d8c749.pdfIn PDF document text
    • http://mevobul.22web.org/pukapaxinubu.pdfIn PDF document text
    • http://berozava.iblogger.org/sejiroxamaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fc9dcaa599ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_6041c8577d847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444110/normal_602dd7924b8f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_6026825669280.pdfIn PDF document text
    • http://tinezukozaga.22web.org/15817597514.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/bipovoromoj/project_portfolio_management_definition_pmi.pdfIn PDF document text
    • http://kufuravolej.rf.gd/62956171659.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/adaway_2._3_apk_free.pdfIn PDF document text
    • http://numelini.epizy.com/simple_contract_agreement_between_two_parties.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/graco_slim_spaces_compact_baby_swing_how_to_change_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/30897544934.pdfIn PDF document text
    • http://vadibezodaxilez.rf.gd/55535793406.pdfIn PDF document text
    • http://xetubuvij.rf.gd/italic_calligraphy_and_handwriting.pdfIn PDF document text
    • http://goseletew.epizy.com/gifaz.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/firefox_offline_installer_free.pdfIn PDF document text
    • http://nematamaduwos.epizy.com/cation_and_anion_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/marvel_heroes_2015_online.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_off0000f03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 5416 bytes
SHA-256: 622df8dfa2005b3243d4ec2b6bfd114d0865c352c3140be4811596282806b7fe
font_01_sfnt_off000102b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 10600 bytes
SHA-256: 47d4f4dcb4b414ee5df5880bdbe9c805adde8f406d55a03e2bbbcab63bad18fa

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