Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded2f664fe8c820b…

MALICIOUS

PDF

60.5 KB Created: 2020-12-10 05:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c543933567694fcce71161153c83b25b SHA-1: 91458bb6870a6ae616d66ea7f70bd24063c52350 SHA-256: ded2f664fe8c820b3323994aed981d38b1465caeac45b3097394b59eb734c7de
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 0.9996

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://traffine.ru/strik?utm_term=brother+920d+serger+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404730/normal_5fb2ce7e45df0.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/8488417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417531/normal_5fcbd6e25d0ef.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/0187cc10f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f66f116eb00e3c4c456d/t/5fcd7fcf5177ea328cd963b3/1607303120615/82894277972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ab6de0-6de8-452b-bdce-ff4531804926/1_def_pure_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f186bda9c57a97be6d6b/t/5fc49fc43570fb44d196080f/1606721476934/12344413190.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/gb_whatsapp_apkpure_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8495b905-08b8-4b6c-b53f-8a921c935246/cartoon_wars_2_mod_apk_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/h._s._c_result_marksheet_2015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5919de2fce462bcaba119/t/5fc9be434e3f3d25173b284e/1607056964866/4592709220.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5677ef9866f3fd2f21712/t/5fc75f794f9413233b20620c/1606901627645/pazapiwojimuzafaxav.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/kimalotakunu.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/84296591721.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf09dc7afe470b5553d07/1606217885906/24157970449.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/referees_report_example.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_off0000afe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE9 5716 bytes
SHA-256: e2515d9b92e460a3bb939c99a313c8b6584fcd3070e034f26b59c0383ef22fc6
font_01_sfnt_off0000c332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC332 10004 bytes
SHA-256: eff2d567590e1d101fc56b0d02e10bb80ef4878eb0f5bfa58f3f62e77d83c655

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