Malicious PDF — malware analysis report

Static analysis result for SHA-256 12608caa5cb0077b…

MALICIOUS

PDF

63.0 KB Created: 2020-12-31 02:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d036aca94a4cf6158054e5a1e4363b65 SHA-1: 2c2b0108e97138b558574823b988e6d63f8324b8 SHA-256: 12608caa5cb0077b8536e238a5b066b359adf7f56e88872e2c0f64cbbf532683
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure. The document body text, though garbled, suggests a lure related to a search query. The presence of numerous links and a critical heuristic firing for malicious redirector links indicates a phishing or scam attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=burger+king+near+me+right+now In PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_5fab36b0d7dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5faf99805898a.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/459529.pdfIn PDF document text
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/wovanuva-ruwugikegonega-fagexoru-zavoriv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5fb86e43a8d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f9177c2982ea.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/b1e78c88-95c3-4267-993e-10b0fca4dd76/jimmy_neutron_mcspankys_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b5262b-1e37-4ece-926b-2c698ef33ebf/protocolo_http.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/datunazosedenoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/61013456397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6299d653-515e-4fb4-a268-524d51478bcf/37258318141.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/xizaxisavebobifofujelon.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/tejibakovofabuzisosek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218379b7-5e83-4d4f-9150-523e45ae6c6a/exercicis_de_determinants_6_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b0e68c-4229-4585-91ae-3704570eccfa/guess_movie_from_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cde128-f9ad-4d84-82ff-9b1fabf3a923/figepiduxilamomopodaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/video_editor_app.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_off0000bd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD87 5092 bytes
SHA-256: d01c36afb8e6b1ecc348c6d3f52d744e900d09817eb2e9f73425cd76445c3257
font_01_sfnt_off0000cec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC4 9420 bytes
SHA-256: 6d231cdf7231fb7c820fa2d462a76ea841489cee1d6823ce9f23e33adc047331

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