Malicious PDF — malware analysis report

Static analysis result for SHA-256 94796d0817430335…

MALICIOUS

PDF

62.5 KB Created: 2020-11-24 04:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f6499a239049c9d1215d6b50a264db2d SHA-1: d785e9d8dfea022e1315f03ed8facbf6631c9f0e SHA-256: 94796d08174303358f483ed6a2125852e824af0fb0276057d1219d58ef353c64
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious or known malicious redirector infrastructure. The heuristic firings indicate this is a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/123?utm_term=active+passive+voice+worksheet+for+class+5 In PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/35b4f1600cf.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/betokojinixanuwirana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5fa5450176efc.pdfIn PDF document text
    • https://jutineriru.weebly.com/uploads/1/3/4/8/134866815/3363518.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/f93830a3-370f-405a-b497-003ae51732fa/nakipazuwojiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6640e9-747f-41ae-a830-d4aee7d92c93/xopaferufurafevewatobo.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/pickleball_tournaments_in_utah_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/papuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/friends_song_mr_jatt_marshmello.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1768f8e3-27ad-4487-a422-c0e5db733011/87319269680.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/gavojon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a81880-7d8d-4505-94a3-589faacb7ee1/nom_courant_de_linfluenza.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_off0000b840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB840 5432 bytes
SHA-256: 4dfed1b267448ce526e36c71b61b59576d1df7e11d67511a597d9963d3620a8d
font_01_sfnt_off0000cad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD2 10392 bytes
SHA-256: 8b14fa39cdc42deaf03a6240d78979dfce82d111a728b99b4f44ed8871a28659

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