Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcefeae9948a8c35…

MALICIOUS

PDF

70.0 KB Created: 2020-12-19 02:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dc1fbf2efbbf24d61e1777860e9b650a SHA-1: 9e21a1b73da7661920b7b080761887ff7be8950f SHA-256: bcefeae9948a8c35fec51414bc765b15066ad3608095c09b53d39d6afd7f187e
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 a large number of external links, many of which are to SEO-optimized PDF documents, suggesting a link farm or phishing attempt. One of the embedded URLs, 'https://trafficel.ru/aws?utm_term=aluminum+sheet+metal+home+depot+canada', is suspicious and likely leads to a malicious site. The ClamAV detection and ML classifier also indicate maliciousness, pointing towards a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=aluminum+sheet+metal+home+depot+canada PDF link annotation
    • https://lozatovetifeg.weebly.com/uploads/1/3/3/9/133999134/xivaxajijexevo.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/jizozuninejeduxuxuge.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/0ad7aa76-ba8f-4cf3-86ff-d138e8cfb14f/xoxamuxevujid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cd50be9b69395123d147/t/5fc79fb2bfb90028be5789d3/1606918067453/best_free_police_scanner_app_australia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe422e08845d0924569243/1606304304044/45313255998.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/78082232543.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/bloc_de_notas_android_sin_publicidad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a03263d-99bb-48f2-9d37-294f469035d7/13914249134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b52f87-1f8a-497f-b69f-3ca65b84ca6b/fluval_fish_tank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71be12c9-3687-42c1-b4b5-976096b5d7db/pevipekinopolaxa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd29b3c66bff209e7fbc61/t/5fdd2ebe892c8943b08fa3c8/1608330944437/gogixipowajebolako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c242135-0c0c-4ee2-a68c-2eb8cae2db12/47060898994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54b8737-5df1-4504-a2ff-c9834bec314a/34470148168.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_off0000d22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22D 5208 bytes
SHA-256: ea2871da6cb60c00ca7ae70a66c1cf494d93d9e281cacc0b320a1ff9f3d943eb
font_01_sfnt_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 11548 bytes
SHA-256: 3d02157464f513eaf5ffec902ecaa37863551eae30e4c79dd689632b96c98790

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