Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2af180b7e99a8a…

MALICIOUS

PDF

68.5 KB Created: 2020-11-28 21:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 765e0a4a40005741d40a204cad8c51e4 SHA-1: dff885e28afaae0ae9c7b2771373c29b6490fdde SHA-256: 1b2af180b7e99a8ab7c0fcfd8b6f9b6f2d40be46651d1881a3c83557062c607e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/aws?utm_term=canadian+visa+application+form+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417314/normal_5fbfa9235d085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5fbc82018a123.pdfIn PDF document text
    • https://fegunase.weebly.com/uploads/1/3/4/6/134603704/e611b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475725/normal_5fabae8067487.pdfIn PDF document text
    • https://nemaxalifaxibox.weebly.com/uploads/1/3/4/6/134627725/ffb14ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f87b1fc8e651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5fa615b298142.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/fizaxo/toh_sanitation_schedule_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/kelowedominidimi.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/contracted_services_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/zajewivefutixumoki.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/93777326803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c638467-7b27-4e15-828f-86eac9da19bd/96891741375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e3cdca-1d0b-41c1-8976-a6efd7ab96dd/58664714836.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_off0000cd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 5748 bytes
SHA-256: f654d66a9a3426254743f1ec1e97c92c8fb5418496fefda8b8e55e6e6b5f6d3e
font_01_sfnt_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 10768 bytes
SHA-256: 1026b016df6ffdf3a0ce482db8df0cc39d3cbb01d805a72d1d1b8ef337bc1069

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