Malicious PDF — malware analysis report

Static analysis result for SHA-256 084909d5320a2ab7…

MALICIOUS

PDF

72.7 KB Created: 2021-02-14 18:27:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 688d66590283180eea6344c032da7b0a SHA-1: 2396b23b6042432e574f561bf67495d2950c2274 SHA-256: 084909d5320a2ab72c2fd6ba0bf6a4319acbcce7bae9f2fcf53c18a6f1d7023b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=millas+a+kilometros+conversi%25C3%25B3n'. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'. The ML classifier strongly indicates maliciousness. The embedded content, though heavily obfuscated, suggests a lure related to unit conversion, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=millas+a+kilometros+conversi%25C3%25B3n In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5fd0df22636a3.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/jdbmxge/jakoxogen.pdfIn PDF document text
    • http://marafonsport.site/international_t444e_service_manualsgfv0.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/ichg6g6/next_fight_night_game_coming_out.pdfIn PDF document text
    • http://esclub.pro/le_argonautiche83sg5.pdfIn PDF document text
    • https://cdn.sqhk.co/pugalaleluti/jNBicji/scrap_it_bc_electric_bike.pdfIn PDF document text
    • http://kyrgyztours.com/59494064945l1pez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_601261a3cca7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff4fb36ce753.pdfIn PDF document text
    • http://dfwshootersupply.com/my_dolphin_show_game_76jf7j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_600e83d65a789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_60129b71a8216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokoziguroron.rf.gd/xesedekipafuwivetubitixo.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/importance_of_action_research_in_education.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/massachusetts_durable_power_of_attorney_form.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/denowaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/bvlgari_ring_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/office_2016_portugus_ativador_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/colour_acrylic_sheet_for_sale.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_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 5208 bytes
SHA-256: c336bb78a31bdc3a22ff48fecc9144649c6c1ff2c524e0b9d458da98f4d5cbfa
font_01_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 11636 bytes
SHA-256: 2322f932a16a314d71bba4b8ffd9b1f9bdcb4ab2e3eefc4aa7559345d1a191e5

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