Malicious PDF — malware analysis report

Static analysis result for SHA-256 098477e546d96f98…

MALICIOUS

PDF

71.2 KB Created: 2021-01-08 13:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8ba1a50d6d30353416a2be1bfc4f0b49 SHA-1: fc16e71a8c235946014acda561e8cac1098783bf SHA-256: 098477e546d96f98a6834932a69cfa74586f697c1da7a8d71ffc5d4f8fd56c03
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, many pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the ClamAV detection. The document body, though heavily obfuscated, contains metadata suggesting it's a PDF generated by wkhtmltopdf, and the presence of external links suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample.

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/123?utm_term=annie+armstrong+easter+offering+history PDF link annotation
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/newuwaka_tepotogu_jinuxadajijepix.pdfIn PDF document text
    • https://gazofifato.weebly.com/uploads/1/3/4/4/134496451/5032973.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/nejerazanesopit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_5fb381250c8df.pdfIn PDF document text
    • https://rafunipigadim.weebly.com/uploads/1/3/1/3/131380466/rujuluvutigapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2030f1-c420-4134-8c6a-059efdd9e7ca/46373933230.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/89930524128.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/badrinath_movie_bgms_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/beltrami_county_jail_roster.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/intermediate_english_reading_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/zutipaxubof.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/evaluation_formative_et_certificative.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/assam_map.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_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 5240 bytes
SHA-256: d053b79abeaff18616fc323001dca129d31e129eac3912dab4889c86874a3437
font_01_sfnt_off0000eada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADA 11024 bytes
SHA-256: 02df9d4c269ef684a6b0ba7436e06ea12c19e35901b6d41431de4378a15d9923

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