Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6dcd058d4539df0…

MALICIOUS

PDF

155.9 KB Created: 2021-03-31 11:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 90031a88c750fd0df140c5b98799aa34 SHA-1: 75054f8aede075ac4e432db80b84083a2eb5fc93 SHA-256: c6dcd058d4539df0dfeb00337bca8971625c9d46b3a50249b61de3bb406886b7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as a link to a research paper. This URL is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=genetic+engineering+and+molecular+biology+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381980/normal_5ff1f1ed2ded4.pdfIn PDF document text
    • https://sokudepan.weebly.com/uploads/1/3/1/8/131871622/vimopusosageri-sezivokokirek-golik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_602466fc35ace.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/7ea9bc2c10423e.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/fozewiseduvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_6030a300f3b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fea2569a8ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_60386dd40824d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fff687a08f28.pdfIn PDF document text
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/3aad03.pdfIn PDF document text
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/xavigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fifuto/tasamu.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/4502471775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c070a0eb-2490-42d2-a5e4-186346fd754b/gaguzosuwisadirekom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9fac7c-c2fd-4233-a59a-866ece9631fd/3540256328.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/81698384911.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/74569024330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8ef44d-d216-4579-9cf5-6d33303c25a7/sevegu.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/ruserisukerenupalenokizap.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_off00022447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22447 5568 bytes
SHA-256: e09bcf675585683864eb7fad1e47cb3c45ca1b3ba34c9ef7801f611b83a1a90b
font_01_sfnt_off0002372f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2372F 13004 bytes
SHA-256: 2606b8a1073dee75d0bfa32659e20c6c7a28b272499701544ec1a43bf1aa89d9

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