Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2d05fb88d6d154…

MALICIOUS

PDF

87.9 KB Created: 2020-11-18 08:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9bd33d117c97fbb71c4b471919ccc85a SHA-1: 18e195a249ef585c04205fa5264c0796bb01983f SHA-256: 8e2d05fb88d6d154512b8ac5a25ad684f363b0bbdd9fbb13e4543fd7b69ccaf7
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various URLs. One prominent URL, traffset.ru, is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=jon+kabat+zinn+full+catastrophe+living PDF link annotation
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/pogijikazem-lejavez-lataf-sabolide.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/6863904.pdfIn PDF document text
    • https://pobafegesodagiz.weebly.com/uploads/1/3/4/3/134305133/zibop-lugurema-zefadolava.pdfIn PDF document text
    • https://judezirebesos.weebly.com/uploads/1/3/4/6/134669344/75a1fd60ac636f8.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/2552478.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/18b5d588-8c6f-4ec6-80d9-956bc8aee946/vunujazazinufoderu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/301904c7-612a-44a7-af7a-6b38eaf48f7b/98781800039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebea4f53-6f83-412e-8e8b-c5300b47e295/4825426881.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/gefav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280d5037-dd5d-413c-920f-ab39c2382064/mexefox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7566b50-56b6-4316-9b35-4d25f5299fad/18_wheels_of_steel_convoy_patch.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_off000104e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E3 5580 bytes
SHA-256: afed902fc8a9af3d9b33c3a7efc9672f9c305155a455c2ef7a88320e22ea3785
font_01_sfnt_off000117ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EF 11100 bytes
SHA-256: 9a6ef3a34dede5463e7ab6799ffee19216e5a731a057f419fa5c8954b9caebea
font_02_sfnt_off00013da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA6 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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