Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff320837ab2dd6ce…

MALICIOUS

PDF

77.6 KB Created: 2021-06-03 05:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f605a43ba78af71fd3b4e78c55cc8321 SHA-1: 7d43a0168d28feb43482350873a0e800f79f42a0 SHA-256: ff320837ab2dd6ceeaf827d6853302d6ff944ddd518c43f69ad3b9d8aa8fb04a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. The PDF contains numerous external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a mass of 30 external links, suggesting an attempt to redirect users to potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to facilitate further compromise or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://cructi.ru/pbw?utm_term=captain+tsubasa+dream+team+mod+ios PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4461234/normal_60b14ba48864d.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/73ed0313df84a.pdfIn PDF document text
    • https://safuziketuxoxu.weebly.com/uploads/1/3/0/8/130814855/16a26052061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_604a692c44f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_6023bbe3e9bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_6025e1686aee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_5fd83bc3efedb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4470553/normal_60b43b6b55419.pdfIn PDF document text
    • https://nopirepogoduk.weebly.com/uploads/1/3/4/0/134095858/8583bf3c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_6019827c730eb.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/6462c41d-48c8-46a8-b39d-c7dfa67916d9/cisco_ccnp_route_exam_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9cdc81-9d90-4d8c-835b-9abe538bb863/7069695143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398b3b40-8527-409b-9010-1a215c2de152/how_to_use_a_frozen_margarita_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ca8a0d-e293-47ce-84ee-3ac3be2b3eaa/14953560891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b142ea31-8855-48f9-a248-9b14b6caa511/how_to_remove_glacier_bay_toilet_flapper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6dd0d0d-4358-4848-9f76-26b0ec937b78/nifosofivukogaxamunamoguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85940520-8df0-454b-a044-8ddbfd3715c4/48692609503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88396c4-7ef1-40a0-9ae1-6dc92e7fe861/where_to_buy_coin_pusher_machines.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA5 5120 bytes
SHA-256: d2b18c34a890d3c2be25e40da9d11e24fea89c218f44f79b0f8ade4d1ee14442
font_01_sfnt_off0000dfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE6 11044 bytes
SHA-256: a0e9dd4adf05e608f7059b9344508cd768b7425bbd79332b1437390b99f85efa
font_02_sfnt_off000105b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B8 20188 bytes
SHA-256: f8b1b1ba60d5edb32802823963a8607529ab222c461f618b1110e398977f3c0a

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