Malicious PDF — malware analysis report

Static analysis result for SHA-256 059bd8a02cf7400b…

MALICIOUS

PDF

65.6 KB Created: 2020-11-21 00:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3bf338736cad78189d90d72578474d79 SHA-1: d341b2439cb04e3724ef084ff9a34f0238d6115d SHA-256: 059bd8a02cf7400b9c51a6c4f7202fdd80fd345dfe7a170ac31d31d93e339ae0
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to create a link farm, likely to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection further support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/aws?utm_term=chakra+healing+guided+meditation+script In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5fa695933e0a5.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/xoramusawug_kafegosuruwo_fopedunowito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f894ca7a7501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_5fb8013032a1f.pdfIn PDF document text
    • https://pisefipekopaz.weebly.com/uploads/1/3/4/4/134461515/d341b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5fa261bd30b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f8b1f404224c.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/be0779fe-a1cf-4640-b784-d87326da594a/tujasedesukafesesedob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479e1122-ba2e-4cfb-84f2-97c085eaafae/cheat_engine_apk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/multivariate_statistical_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/tatag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a24901-8f2a-4759-b6b0-e8a3ee391464/mp3_player_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/57238077183.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_off0000c5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D4 5456 bytes
SHA-256: 05a3b997f12a824ba064045e242459581aac411ee0f495fe20eea55cd68eaa0f
font_01_sfnt_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 9820 bytes
SHA-256: f2dfc6a0a4d8e674285c3690bea22d69bfa0f8114fc20215a83266b1a2732f96

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