Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dabefeeb7fdbc8f…

MALICIOUS

PDF

81.2 KB Created: 2021-02-27 11:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aeb775839995963f02bccef95915fc25 SHA-1: caa868350112d0383f0e91352e36cf1b10f82610 SHA-256: 8dabefeeb7fdbc8f974523f2845a84c063d9beb4eff1b2afd78d09914ad12912
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://zajinet.ru/123?utm_term=plantronics+wireless+headset+usb+cable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417531/normal_60217825e922a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_6020d290e395c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486041/normal_5fc98c719e7b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417643/normal_60048c6b3105f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5fdd5a91206b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudavoje.epizy.com/what_is_the_history_of_the_police_force_in_the_united_states.pdfIn PDF document text
    • http://bajaxugezozego.rf.gd/jesidebamitolabupagegalez.pdfIn PDF document text
    • http://xoraruboxa.epizy.com/85279918078.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/investigative_report_memo_format.pdfIn PDF document text
    • http://kujujigufa.epizy.com/anabaptists_protestant_reformation.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/chemical_reaction_notation_arrows.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/appointment_letter_format_in_word_one_page.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/affinity_photo_free_for_mac.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/excuse_letter_format_absent_school.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_off0000fe7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7B 5260 bytes
SHA-256: 15c19da5553e5e51ab81de47157bb849e2bdade692acf60841c7edc17bd6df80
font_01_sfnt_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 11480 bytes
SHA-256: c4cab3cd08d002a326a376d73185cff6efd6ce365d0563fb1272eb9745e070ba

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