Malicious PDF — malware analysis report

Static analysis result for SHA-256 c465e1a20aba9443…

MALICIOUS

PDF

107.8 KB Created: 2021-04-03 12:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f9ab9a6595c3ef50d2330d9379c81a5d SHA-1: 069024f29fd3c0919aa44bc339cb6ad25ff06cc1 SHA-256: c465e1a20aba9443dc2d018d9f57adc1264dc903a0e72016465b68447c3c890d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of an attempt to redirect the user to malicious content.

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://botokaw.ru/wix?keyword=congruence+and+transformations+worksheet PDF link annotation
    • https://repamepofasepa.weebly.com/uploads/1/3/1/4/131437198/xobegeriworufig-nekanuxuwukoxop-safesomumizu.pdfIn PDF document text
    • http://azorocheat6.xyz/autenticos_decadentes_tu_forma_de_ser9ek5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_602e52d837270.pdfIn PDF document text
    • http://varnisvakq.ru/badger_garbage_disposal_leaking_from_power_cordymbyy.pdfIn PDF document text
    • http://sehq.xyz/86766082419fuxz7.pdfIn PDF document text
    • http://medicalpracticementor.com/32389596548c2z1n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_604c97cf06840.pdfIn PDF document text
    • https://veregatuvodomos.weebly.com/uploads/1/3/3/9/133997599/831876.pdfIn PDF document text
    • http://molotkov.site/best_intro_philosophy_coursesjz6mr.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/190650811974ngwf.pdfIn PDF document text
    • http://thelait.pro/5663352226euk63.pdfIn PDF document text
    • https://wirujiko.weebly.com/uploads/1/3/4/9/134900452/retiruvopo_pejusi_zenakamubomab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_600f7e4809451.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/34694087845rwfhc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5fd5f62d30e7f.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/pevuwarobuvowa/metodo_anticonceptivo_ritmo.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/world_economic_forum_global_competitiveness_report_data.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/hamilton_beach_flexbrew_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/rational_inequalities_word_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/lista_de_verbos_regulares_mas_usados_en_ingles_con_pronunciacion.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/how_do_you_quilt_a_disappearing_9_patch.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_off00013eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEC 5464 bytes
SHA-256: 109188f333839d617db7dc1a7f95c50a85e4ec19bc07e4b760c947e9a989639c
font_01_sfnt_off0001516c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1516C 31516 bytes
SHA-256: c19fb92aef1d5a37473cf47eee15b1e1785d3032ee9d6198b7c96d1c37bc6126

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