Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a020554d11a6d12…

MALICIOUS

PDF

69.7 KB Created: 2020-12-03 22:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6cdfaae7c1a73afe8ed523b0a88eb885 SHA-1: b3c359d2dead0a8002336e00248501f0c6f05faa SHA-256: 6a020554d11a6d1222f050bbad20f0d847ce23f3c8268007bd398cb99d64c1c8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, including one to 'traffking.ru', suggesting a link farm or redirection to malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, with 'Pdf.Phishing.Trojan' being a specific detection name. While no scripts were explicitly extracted, the PDF structure and extensive external links point towards a phishing or malware distribution attempt, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=microsoft+access+gantt+chart+template PDF link annotation
    • https://rinavufapakoto.weebly.com/uploads/1/3/4/4/134460237/winefipudasupalemuk.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/zuwunozafapajew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478387/normal_5fb28693b9058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f914546c9a5b.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/ganubatebedoxez/16795799467.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/22095599979.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/bcma_fee_guide_medical_legal_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/princess_cruises_ships_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/writing_and_evaluating_expressions_worksheet_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/42973566478.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/manual_of_cardiac_surgery_instruments.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/zafeborena.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_off0000c6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CF 5224 bytes
SHA-256: 96cbd8ca6f5bd1b2bb8a9492ae5c14949ae179828a64ebae0a0721d091217597
font_01_sfnt_off0000d85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 10268 bytes
SHA-256: 1c919be9a0305fc4d35589641b0da5bcd10306f36f35b6247b8bd2e693274cd8
font_02_sfnt_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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