Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f3d99af27fcb00…

MALICIOUS

PDF

65.3 KB Created: 2020-11-18 11:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0f6bb241570f56047fff475e5244e34a SHA-1: 98bfcb97c2f71730cd07203f360a41a6924172d6 SHA-256: e7f3d99af27fcb00a86de6c143dccccf242c43e9e7bdad1584c679ae90279884
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it contains malicious content. It features a link farm with numerous external PDF links, including a redirector to known malicious infrastructure at 'ggtraff.ru'. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malicious redirection scheme.

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://ggtraff.ru/aws?utm_term=aupcharik+aur+anopcharik+patra+format In PDF document text
    • https://bovexojegej.weebly.com/uploads/1/3/4/4/134481742/90d30a0f17a.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f9d3f0f4a320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f8ee5e3734ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462351/normal_5fa1a953842fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465719/normal_5fb265feaec73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_5fa881096ba45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f876e04b28be.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/552f520d-43a5-461e-9365-1b2a9f513c72/map_of_galt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0972be-4747-4a4f-a56d-330914d29d61/valikibaredi.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/buds_gun_shop_ammo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f01647f-fc3e-4c96-b15f-b8297a281c7d/herstein_topics_in_algebra_solutions_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba128a3-bc2e-4583-a648-23cfcab31447/mowewira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbaccdca-6f24-4a67-be02-b0cfcafaa2c2/17719952728.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_off0000c3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A3 5100 bytes
SHA-256: c30409be61134bbba70aed70f086cb005d3bdf903df627814443df85185412b4
font_01_sfnt_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 10272 bytes
SHA-256: 533656ba647ed864947aa753cce222990ddf6da6235901ba3d9d098962625b79

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