Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d2335546a8400e…

MALICIOUS

PDF

66.5 KB Created: 2020-11-17 02:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59336ed81db83c374a65407b4ad8a57e SHA-1: 5a59501eb3c5288c40e7f921715bbe91cbe876af SHA-256: 15d2335546a8400e49dd7b59ad11fb0dd318125c1ae6f5d152a029b4a44aee40
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic suggests the document is designed to host or link to a large number of external resources, potentially for SEO abuse or to distribute further malware. While no explicit scripts were extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=bioshock+infinite+best+weapons PDF link annotation
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/8383358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_5fa55551d0f12.pdfIn PDF document text
    • https://saloramorolo.weebly.com/uploads/1/3/4/3/134307331/fedew.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/ramazadezi.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/395968e2-a2e6-4ae0-9381-23e7f305cda0/davit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b18772-1511-4101-8a28-54535b345559/hobart_amx_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/agreement_paper_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/abraham_martin_and_john_lyrics_dion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a378355a-4368-4cbf-bb59-5ea9b9cf56da/wonitisifekewuwagakela.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/kodisanitaxurojifezerizor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fddba4d-9d71-49c8-bf47-fd06f9aa04ca/94728897146.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/16210450852.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/ginisiguteput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9020d878-cf94-4948-8c8a-5e1f3648ad6a/67520026513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071b68e0-a8d2-407c-8726-3de573a8b005/lion_king_123movies.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_off0000ca01.bin
4bd6cc6ae85e67c80e6166c87681cb69b843fef67adb9bfe0411e7ec67e180f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA01 5320 bytes
font_01_sfnt_off0000dc35.bin
95fd9732de21fe0f0d9addfcd576720757c541f069e029cf67094f123d75762c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 9688 bytes

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