Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f46520a1e96718e…

MALICIOUS

PDF

67.1 KB Created: 2020-11-11 17:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c8f0de8bc4c4c3996d6e96a74a425a93 SHA-1: d61620ff462e56426ab5c0c2d233e7323b14df7e SHA-256: 7f46520a1e96718ed6f588e0c306d2676e59c7a27e7c00d75212ea22f2cad7b2
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=formation+of+air+masses PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f8c921214016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5fa15b8d3ae08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f9103b303b96.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/dorulusof/vusurogozupasozevuwidi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/download_my_hero_academia_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/schedule_d_tax_worksheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/what_are_the_different_types_of_context.pdfIn PDF document text
    • https://s3.amazonaws.com/rimadefule/69275501784.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/92133904181.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/warmane_3.3.5_hunter_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/pafiro.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/jack_dalton_park_martinsville_va.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/ruvatisumagibiwaben.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/aspire_simple_machines.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_off0000cb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB64 4836 bytes
SHA-256: 36ba232e2867c35a842ce27352870946975886dcdc2a99a77433dc89fe660b7d
font_01_sfnt_off0000dbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBB 10576 bytes
SHA-256: f4e14d8aa938f4ec65b48f05918d136c2f0f0df238d11ea638111be0fbc7f7ed

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