Malicious PDF — malware analysis report

Static analysis result for SHA-256 b167d125162f62e5…

MALICIOUS

PDF

68.3 KB Created: 2020-11-24 07:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d82feebcb8851c9a8c6632886ce9d15b SHA-1: 74a300618e78eeaddaee505b00cd67a1b9852f03 SHA-256: b167d125162f62e53995f410ea49c20a1482fd76dc64e9e06d4fc244a036ef1f
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector, suggesting an attempt to lead the user to a malicious site, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious intent to redirect users.

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://gettraff.ru/strik?utm_term=legrand+cable+trunking+catalogue+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_5faad8e632308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5f8e470568388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5fa73fd5c8e0b.pdfIn PDF document text
    • https://rusunesezov.weebly.com/uploads/1/3/4/3/134309606/janoririsukorig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_5fb33e4d0680d.pdfIn PDF document text
    • https://goraworozegisu.weebly.com/uploads/1/3/4/3/134324811/d6dd0aeacf619f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_5fbc86766651a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fa16a602fc0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f9e8f17187ac.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/62223c12-01d5-4537-9c6d-569f204d983d/sagafidinovebuwowosarates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9baf2227-1615-4611-8b75-77824ebc86d9/bandera_de_los_pueblos_originarios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d8d013-2489-4191-93e4-489437a43a6a/13326883527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68368b1c-485e-442f-8168-cb275d4f63a5/gobinubesopijusubuwelovab.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_off0000c9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C1 5292 bytes
SHA-256: 8d50dcd99cdc9f203908532ea6fd12305640925de6b56e572f4136c0fba8c904
font_01_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 11480 bytes
SHA-256: 9b97e685e08a012a305b92541c0adec2b31aca20266ee616f210b8740a56d39b

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