Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc19964621586706…

MALICIOUS

PDF

73.8 KB Created: 2021-02-24 19:33:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 0602264e124e2d83661ca6460e70dbef SHA-1: a5148a5425522e21112a53b43dd58145e4af7689 SHA-256: cc19964621586706b6adf3162b03ed1c99563ca25903646982753ea5dc1594d6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing. One prominent link directs to 'jacksth.ru', suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure or a downloader disguised as a benign document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=kingsbrook+hospital+brooklyn+new+york PDF link annotation
    • http://fefiwizam.sportsontheweb.net/19632016635.pdfIn PDF document text
    • https://xofijenafoku.weebly.com/uploads/1/3/5/3/135349300/tajek.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/6704922b.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/xurixado/bcbs_ga_federal_appeal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/annuity_due_example_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/wakufobi.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/geminumujilap.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/wbcs_sociology_optional_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/16571526361.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/kraft_heinz_sustainability_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/54460698529.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/facebook_basic_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/trials_of_apollo_tower_of_nero_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/rusexafufovidijufasedowex.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/67764639149.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/tableau_calculated_field_change_date_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/riwopawusebokilel.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/febamuwuku.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_off0000e3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C3 5448 bytes
SHA-256: 42ea0ff028afaab6c108f3502d521602f84de0b6299f113fb99b7f307d86b6fd
font_01_sfnt_off0000f65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 10476 bytes
SHA-256: 09c5c60bfb8cae8dc8715dfa313978f650eef94d759638b37b2f124aef15671a

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