Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2676e70275a4c8…

MALICIOUS

PDF

74.4 KB Created: 2021-03-31 10:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 98ad6da74dd1b40d5b3eed6bb8285395 SHA-1: 62992b555a88d52fd19c37e4e33ed8ead10d955c SHA-256: 6a2676e70275a4c896e254b89afb46b19e93264073d4f53b41e40181fc0000a9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=phonics+workbook+pdf+grade+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fcb3f218ce8f.pdfIn PDF document text
    • https://dofipoxadule.weebly.com/uploads/1/3/4/3/134314370/giwadeb_mixaku_wulin.pdfIn PDF document text
    • http://bio-ita.fun/felsefe_tarihi_macit_gkberk5xt5l.pdfIn PDF document text
    • https://jesimubevudoku.weebly.com/uploads/1/3/4/8/134873829/pebakodewun-zogap.pdfIn PDF document text
    • https://dovasumaba.weebly.com/uploads/1/3/4/6/134627072/03938156469cab.pdfIn PDF document text
    • https://ruliduwaj.weebly.com/uploads/1/3/4/0/134016670/cb8c3104ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_600bfb57bad6f.pdfIn PDF document text
    • http://vas-rem.ru/cima_e3_study_text_strategic_managementw7y86.pdfIn PDF document text
    • http://sallehub.xyz/linux_basics_for_hackers_booke2mdw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_6063b31173626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_601aba8c37854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosofaxiwobud.epizy.com/worship_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/44797190562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea0aefb-8352-4a2c-8c5d-19752cd2347c/fejinuvedoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/my_wcc_email_login.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/2d_discrete_wavelet_transform_example.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/78757959724.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/46000090539.pdfIn PDF document text
    • http://bunisanabasa.epizy.com/appscan_source_for_analysis_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f5c6ce-ff0d-45b4-92e8-5b93074bbdff/94753012922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12018c2f-b668-45a4-b9b8-852d9581c771/47432574610.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/what_are_the_traditional_music_of_africa_brainly.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_off0000e33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 5812 bytes
SHA-256: 354bba3394c7dc809dcdee4bdea6967253622baeefe62b90f7b30fc447863789
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 10940 bytes
SHA-256: 1afad50eaab46cb7d92f9a5ecf71a30ec667b3a1165b4fc34101cefcad458202

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