Malicious PDF — malware analysis report

Static analysis result for SHA-256 1694a39d87005803…

MALICIOUS

PDF

76.6 KB Created: 2021-05-08 13:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e0a34f1e800189498da92b6fb50796e9 SHA-1: 77e619942fc85547008caed2b0606d083fe9f259 SHA-256: 1694a39d87005803b3d4073447732f30b68704ba0bf83493c37600efd694b279
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection scheme, likely using JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=what+is+the+best+airless+paint+sprayer PDF link annotation
    • http://tejovotemikodes.getenjoyment.net/59027163720.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/medical_virology_white_fenner.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/price_action_bible_free_downloado5w7t.pdfIn PDF document text
    • https://kinumefiboposif.weebly.com/uploads/1/3/4/8/134865532/xopimufesokib.pdfIn PDF document text
    • http://tatabumilik.iblogger.org/science_geek_atomic_structure_quiz_answers.pdfIn PDF document text
    • http://ericksandoval.com/la_esposa_que_ora_por_su_esposo_dia_60catc.pdfIn PDF document text
    • https://fibexijenoka.weebly.com/uploads/1/3/2/6/132680926/5968231.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/35112.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/responsive_web_design_template_w3.pdfIn PDF document text
    • http://gexulogoben.sportsontheweb.net/jivudufozopazel.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/84062517441.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/fewunadupop/zoxirolijakokilefidu.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/19904042081.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/10160371886.pdfIn PDF document text
    • http://mimumugemefes.epizy.com/the_professor_and_the_madman_story.pdfIn PDF document text
    • http://vepunip.rf.gd/ziwozumojanipis.pdfIn PDF document text
    • http://fuvimexapa.rf.gd/reptile_and_amphibian_merit_badge.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/2018_lipid_guidelines.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/stihl_261_vs_271.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/windows_defender_security_center.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_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 5164 bytes
SHA-256: 83604e1d8848bf109cbfba17db6162582b0b0cea3773f89121c5aff8fc0ba2b0
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 10768 bytes
SHA-256: 9a26dd981205c063e62f3b1bce71a24b13633ce95f94faa1dafc660f6bf6252f

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