Malicious PDF — malware analysis report

Static analysis result for SHA-256 113eb86b253c71a1…

MALICIOUS

PDF

72.7 KB Created: 2020-11-17 08:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2787ae5eaaa24857df6df5c3733f80df SHA-1: 5cdd3fd765b2f5de12a95903ef6a834a4c7c690c SHA-256: 113eb86b253c71a16b1fca4b07a0b169e8438975c28d902a900e6486bace9159
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=pci+express+2.0+x16+graphics+card+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5faae7cab3b16.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/piraboka-botazabubinug-zamawek-medowapapuse.pdfIn PDF document text
    • https://bigamurutixigi.weebly.com/uploads/1/3/4/4/134481126/kexuwef-vixapasoxurexe.pdfIn PDF document text
    • https://xotituwidekave.weebly.com/uploads/1/3/4/5/134585458/ziwopebeluliv_junonixuvib_vozatizo_vavipefatelumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87554310bb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fa75803ce969.pdfIn PDF document text
    • https://masarifixi.weebly.com/uploads/1/3/4/4/134486171/bubugujugiguwekuve.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/f7a0c79b-5bbe-4d69-bcdc-c16e7ae1a513/84598516349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f777dd-b80f-4bb7-94d1-077c079b5904/65589662417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2060fd-826f-4498-a67e-43e34c58e2f5/youre_killin_me_smalls_svg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628aa4d7-439c-4557-947c-220b69c64959/wejagufozufititawofuvos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1685b5bc-82d7-4a5c-a0f9-83877b66f8dc/10188264061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e78a7f5-9976-4ab2-90f1-2537a7e43408/failed_to_request_file_info_from_nexus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 5916 bytes
SHA-256: 987698f012b13c20a4722a30581e2cd753bd3831c6d86787369f9108083c9bdd
font_01_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 15484 bytes
SHA-256: 44bf64ed39e0c81272742d0adec3cb23e1043f91e7f9332c7bb354bf325795ea

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