Malicious PDF — malware analysis report

Static analysis result for SHA-256 689edff59aa54169…

MALICIOUS

PDF

57.8 KB Created: 2020-11-14 06:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a3062fea60b32d3576b195627e258209 SHA-1: e6f5f6144acaddf3bf7d06922cf73efa383fd2d5 SHA-256: 689edff59aa541691bd1810037bee0f59e64145ca7aa70bed97648ecbbd3c4c3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, with one pointing to 'traffnew.ru', suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to manipulate search results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/aws?utm_term=kasarian+ng+pangngalan+worksheets+grade+6+pdf PDF link annotation
    • https://sojomirolasa.weebly.com/uploads/1/3/4/3/134325131/a2671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f97bf8a214a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f991397b2401.pdfIn PDF document text
    • https://xuduburuk.weebly.com/uploads/1/3/4/3/134323667/kutalod.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/nujepenali_durepif_sivejekitalofa_jazili.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/fb7e5a6c.pdfIn PDF document text
    • https://nixofukotozawe.weebly.com/uploads/1/3/4/3/134313466/sikuvif.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/luropi/gatedudidokani.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/seattle_to_dubai_distance.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/pdf_the_complete_interview_answer_guide_don.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64b13da-27cc-4b38-9bdf-1c0e04665e17/vazutalan.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/lubil.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_off0000a80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA80B 5584 bytes
SHA-256: b588d6d25d90eef1a4c61bb2c5d6e4283e5dcb7d667cfdcd99cdc9babdd67c3c
font_01_sfnt_off0000bb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB15 9180 bytes
SHA-256: 784767c25cbd0614bbb2b079ec1ee2baada090c81fdde18412baa322cc357fd2

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