Malicious PDF — malware analysis report

Static analysis result for SHA-256 9560fd82c6981b1d…

MALICIOUS

PDF

76.7 KB Created: 2021-01-19 17:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4fb370c6b0cd64173e8a618759229e20 SHA-1: 74b9b959829379023e3450909756389ce3fdda11 SHA-256: 9560fd82c6981b1d0d0240989fdfc0503294e897e128ee655f48946ff43212d6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a large number of external PDFs. The primary external URL, 'https://jottigo.ru/aws?utm_term=product+catalog+template+ppt', suggests a lure related to product catalog templates. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware delivery.

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://jottigo.ru/aws?utm_term=product+catalog+template+ppt PDF link annotation
    • https://cdn.sqhk.co/xexisini/RKegdhh/air_traffic_controller_starting_salary_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5fbdd531cea99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5fe99b67a6bcf.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/ibivpib/apply_defence_white_card_qld.pdfIn PDF document text
    • http://nibumuxadata.66ghz.com/sojufugajedisubunagow.pdfIn PDF document text
    • https://lurusinobafor.weebly.com/uploads/1/3/2/7/132710654/vetem.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/luxaduzimase/accident_report_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/healthcare_behavioral_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/mavedufidonidasiru.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/74373542057.pdfIn PDF document text
    • http://vaxesopubowutuf.rf.gd/cbs_verizon_halftime_report_commentators_2019.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/37872207919.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/rovowexugelosivonenikavin.pdfIn PDF document text
    • http://rajamuviw.epizy.com/68750091913.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_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 5216 bytes
SHA-256: 745cda02e553bd70c1b9f2dc4b64ae0262bc00a4f7f4c22149d85f6501c90b69
font_01_sfnt_off000100c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 11180 bytes
SHA-256: 91ba9e28f6eeffeb982750c2e2049f8a7d09e15e986ac156b1d9f9e7fa9d8708

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