Malicious PDF — malware analysis report

Static analysis result for SHA-256 09202e5cb8e5de72…

MALICIOUS

PDF

66.1 KB Created: 2020-11-09 18:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 59e1f3b4aa867172df6057f6f40a9e01 SHA-1: 12e839f2ad203957d9bead4b7ff636a64c18f2fc SHA-256: 09202e5cb8e5de729899f9fbd9ad9f65de03433ea05e1a28821820b70de54fba
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, with a critical heuristic flagging it as a 'PDF_SEO_LINK_FARM'. The primary malicious URLs identified are trafftec.ru and kerizivol.weebly.com, suggesting a phishing or SEO spam campaign. No scripts were extracted, but the PDF structure itself facilitates the attack.

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
  • 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://trafftec.ru/aws?keyword=rules+in+computer+laboratory PDF link annotation
    • https://kerizivol.weebly.com/uploads/1/3/4/6/134665291/46a73a56c.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/4744799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_5fa5b470647cb.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/209934fc111cd0.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/fc406084-0a47-4391-80ff-02cec568fc92/8974703740.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/25396240455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f10a3a0-dafc-40ee-a594-182b24b26a7f/centurylink_webmail_secure_login.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/20177097523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37483aa2-5cef-4e87-9294-481ab3c4f01a/td-v26_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc453421-1874-4d89-8ef5-f1b00eef7b38/epson_error_0x9a_repair_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/60421307140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be6d55f2-0c83-494a-bc77-c11cdaab622a/22422026608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5fb5f8-4977-4ad9-aaef-c2b60aee6971/12049960986.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_off0000c57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57D 5328 bytes
SHA-256: 84b61cd82d9585060ea1b9dfc8a94c8025eba2669fe8c5bc5721ca29a38fae9a
font_01_sfnt_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 10780 bytes
SHA-256: 98b3ac7ba0e7a838362b142207ca072146ebce1b4a220747b98064765c49080e

Open this report in the interactive analyzer, or submit your own file for analysis.