Malicious PDF — malware analysis report

Static analysis result for SHA-256 648cf24d35d7d677…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 19:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8e2fba24d9ae481e8222f4b4b6269f6d SHA-1: 9da1e3feea16776b3a6213b90d46bb87f9e80c57 SHA-256: 648cf24d35d7d67736d6240f98d84a8af4a240f1793c1daeb9b4df63b0f7e18f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to search results or content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=summer+in+spanish+verano PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376870/normal_603448171e3b3.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/c5thaia/face_changing_mask_applying_brush.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/9gjTiff/26199046369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_601f0480e7767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5ff30947c4f50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388272/normal_60068d1b40561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_6038bc047c6d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489035/normal_602372b25d1a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_6022ecc130ab3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413846/normal_600734b030036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5fe367acbe960.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/advanced_camarilla_calculator_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/daily_nation_news_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/jebas.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/25942433750.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/nulabijota.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/total_quality_management_manufacturing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/91526999889.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 4992 bytes
SHA-256: 8d3869c8239482fefa3bc3089a4e4894867ab3d8b3c5ddc55a449a3a8caed91f
font_01_sfnt_off0000efc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 10412 bytes
SHA-256: e3a4818b178f755a9ed02e4ffc0eb3d379ce3eb345818a09597f84a195c600fc
font_02_sfnt_off00011373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11373 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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