Malicious PDF — malware analysis report

Static analysis result for SHA-256 934fa97f9fb7f0ec…

MALICIOUS

PDF

75.9 KB Created: 2021-01-21 11:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1b498abf1cd83203e9e5b977da3dd4f1 SHA-1: 4aac8a4dc9c1388c16ba574354c413adc83e96b9 SHA-256: 934fa97f9fb7f0ec8d67e0e78ac64fa3ce6fa126b66ff8c55ee1b24f48f22643
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body text, though partially corrupted, suggests it is attempting to impersonate a spreadsheet, likely as a lure for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=ophtho+match+2020+spreadsheet PDF link annotation
    • http://ramosek.iblogger.org/android_studio_requires_jdk_1._8.pdfIn PDF document text
    • https://site-1177757.mozfiles.com/files/1177757/pepowuravuworibed.pdfIn PDF document text
    • https://site-1175916.mozfiles.com/files/1175916/71801980565.pdfIn PDF document text
    • https://site-1178112.mozfiles.com/files/1178112/54704969505.pdfIn PDF document text
    • https://site-1173582.mozfiles.com/files/1173582/derwent_innovation_patent_coverage.pdfIn PDF document text
    • https://site-1167926.mozfiles.com/files/1167926/fesokawetukobeboruwebum.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/80877989741.pdfIn PDF document text
    • https://site-1178617.mozfiles.com/files/1178617/34859572510.pdfIn PDF document text
    • https://site-1168117.mozfiles.com/files/1168117/13724799476.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/rujabepifar/piwewanezowapofibimuku.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/rejozanunopasozuvijozu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/xajawilirawusita.pdfIn PDF document text
    • http://vowefaxi.epizy.com/gebojipaneturiwomegororad.pdfIn PDF document text
    • http://latowetutut.epizy.com/47286595604.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/bafajetowazusofotevilo.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_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 5584 bytes
SHA-256: 778a2c1e25c3be11cc73eb9eaebd60eaf50166a7cf1a4e60ec572b4f8075ce54
font_01_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 11192 bytes
SHA-256: 0b5d857ef1f2995357037c10f4d10f59dcbdc3a13c3fe04a8191d1f15666fbe6

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