Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadbcd0c868e3984…

MALICIOUS

PDF

68.6 KB Created: 2020-11-17 00:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b6130d83e29523d24387723a36e11e93 SHA-1: 67e7019959005755cfdd4c21f78385f7e82112fe SHA-256: fadbcd0c868e39849b4bbe010d4b89e7ce8cc16bb4b79ed2ea91a5badbc2dfb5
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is part of a larger link farm, likely for SEO manipulation or to host malicious content. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

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://cctraff.ru/wb?keyword=aerial%20lift%20of%20connecticut%20manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489429/normal_5fb2f5751f7b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5f9be54f4e5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f8fa4436f731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5f9c1b8a8d43f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f9bd52ddc2c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383138/normal_5f9db653db288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_5fae574be3027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f88fe7837b88.pdfIn PDF document text
    • https://gukulijavezo.weebly.com/uploads/1/3/4/7/134714581/808ef0a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_5f9d3d0800a89.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/d4651521-c694-408c-80d7-fdffcf753351/11563441361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe454ad-5025-4c12-b327-f1f8819aef3c/high_protein_foods_list_low_fat_and.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e8d224-9781-4f01-85a4-1e0b5fcc3b37/taxubopenuruvofodex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61939706-2bf6-4c31-ae44-d4e482ed0766/rupuzoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252a6116-3644-4808-a06d-5aced59a1a5c/jurodepijaki.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_off0000d190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD190 4840 bytes
SHA-256: ff6a4ec22fdf965ca0492e3e5cdf1b7036a0419b4a2b06c954fd440ada29337a
font_01_sfnt_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 10700 bytes
SHA-256: ef00fe315b83204a14a10c612484c8093f6e362080de5cdf87c237f6aa01187b

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