Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c68f1a3ea76f01…

MALICIOUS

PDF

90.5 KB Created: 2021-02-11 08:03:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2a9ded6a25f51b32dbaa5731c1c0ae42 SHA-1: 3c44c7422b07d217053e57f4aa90d1a5204a0e10 SHA-256: 74c68f1a3ea76f018236fda876cf47954b5aaee961d8461de42c92d38e72207b
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 of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content or download further payloads.

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://seumenha.ru/aws?utm_term=difference+between+assent+and+informed+consent PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495393/normal_5ff2d315aac1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5ff4981548925.pdfIn PDF document text
    • http://tugrull.com/lidisarokidajobiq7q9h.pdfIn PDF document text
    • http://losqutoq.online/weight_gain_workout_plankno8p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fc7d502e534b.pdfIn PDF document text
    • http://siondez.ru/aprender_ingles_en_7_dias_gratisprfew.pdfIn PDF document text
    • http://dkmz2.club/38887153723qhduw.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/9250158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459791/normal_600940d4de5be.pdfIn PDF document text
    • http://alcozerox.com/dog_man_book_3ffa5t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jovekus/certificate_templates_free_word.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/nc_offshore_fishing_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/first_day_of_school_chalkboard_template.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/19607687630.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/meaning_of_report_writing_in_marathi_language.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/wound_assessment_tool_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/61381856251.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C4 5152 bytes
SHA-256: 7fe3f78183d6cbdc953f907451dd3a12acee2ca45dd97afcfd2a6f8a6b0a1228
font_01_sfnt_off0001293d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293D 10852 bytes
SHA-256: e649c7668c537dd34d1eb28235add79f6737585502b4e3ed2f0cb78f14363d21
font_02_sfnt_off00014dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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