Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab267cc9d6a03171…

MALICIOUS

PDF

87.3 KB Created: 2021-03-07 11:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 392a8cc9b4fed7813c79c2d0d6c3568d SHA-1: 1fef97573e0f6139139b9d70c518c9292929b06b SHA-256: ab267cc9d6a03171b90152f7244506c8fcd929c548acf6c762e9f4a069cbc5bb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to malicious sites. The ClamAV detection and ML classifier also strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/aws?utm_term=charge+air+pro+5hp+60+gallon+stand+up+air+compressor PDF link annotation
    • https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/734dd.pdfIn PDF document text
    • https://texapusozos.weebly.com/uploads/1/3/1/4/131407592/27ec6ab68ad6e.pdfIn PDF document text
    • http://citruss.space/jemasupuqh1a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fc7466c72afe.pdfIn PDF document text
    • https://linowatudevenur.weebly.com/uploads/1/3/4/5/134599813/fuzuwefifopaget.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_602d8d3c585e0.pdfIn PDF document text
    • http://mikrotikwizard.com/que_es_la_inteligencia_emocional_en_psicologiakls3d.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/dekogamik/54444081180.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/59854026755.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/lagu_lalit_dua_averiana_br_barus.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/donuridawovakawen.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/20260884554.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/how_do_i_make_an_appointment_to_get_my_permit.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/chisel_mod_1._8._9.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/1273587313.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/dictionary_english_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/tuzozuvolinesun.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/guidestone_funds_board_of_trustees.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/dositefexarubo.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_off000115db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DB 5812 bytes
SHA-256: 7737f0c15b50773f1d8f2509c66c265eac5acd4715b4860b5224250a7274c2f1
font_01_sfnt_off00012978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12978 11228 bytes
SHA-256: 59c15d40093ea7e8e3fd4c46863d1306bd05c38f7a5bdbd4a85d4b929374100f

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