Malicious PDF — malware analysis report

Static analysis result for SHA-256 f053f494006f4450…

MALICIOUS

PDF

70.6 KB Created: 2020-11-14 01:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 247f7be226f13e54da957e0023ef22dc SHA-1: 1cc91913e4c6e4f643bdf83f8ecc303a35ddd03d SHA-256: f053f494006f44502d958eceda308e2cf70ba0ce65fcac30f32b216305289c4e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One prominent URL, 'https://trafftec.ru/aws?utm_term=video+er+hd+1080p', suggests a lure related to video content. ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further confirms its malicious nature, likely involving phishing or the distribution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=video+er+hd+1080p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417207/normal_5f9a21c318316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5f98927cafc56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5faa5240c1cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f95a1ae932bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f92911423bc9.pdfIn PDF document text
    • https://falobulavogibe.weebly.com/uploads/1/3/4/6/134662271/tedox_fadoxogamudaxux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_5fa0560bd9046.pdfIn PDF document text
    • https://mupawume.weebly.com/uploads/1/3/4/3/134365579/3236655.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/vuxajobufojujusid.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/447408c8-b7c1-4fb5-b74c-f3810a2927ee/conectandonos_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/hillsborough_county_school_schedule_2019-20.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_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 4980 bytes
SHA-256: 2e2819d7f93a415eab2def74b45b180eb5e29efa765598c844442a7d54814d88
font_01_sfnt_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 10216 bytes
SHA-256: e8f23feb7fe5a6b66ae3ece4df5bfc92c48b2a8b372b36fb8ef59afb88140058

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