Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b570ceb9f7cfab6…

MALICIOUS

PDF

73.7 KB Created: 2020-12-17 15:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 33e769a447569633532d3f9d8fc7e17b SHA-1: 35b3a3e2e1d3e48f6b09ccd19199a1957367262d SHA-256: 5b570ceb9f7cfab6519cd5a63ae1bc029f3e15c8aed8b9c01f566eaeaf396b4b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to web development, potentially serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://trafftec.ru/aws?utm_term=post+form+data+to+controller+using+ajax PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5f9de4d3031fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5fc5c035b3b88.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/kakegibefokow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fcd02001408d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fd761852c7d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5fd67c39760e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5f8e221fa4a88.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/5fc6ed5bbcf5f06bcb75bdda/t/5fcd3d700ab5d62febfe9f68/1607286129433/last_blade_2_dreamcast_vga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f88bd26ff1194f740ef3/t/5fc26e7be18c5c478e4a39d7/1606577788199/82807632951.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/darjeeling_travel_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/netbeans_jdk_64_bit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce0678cc0d2519aa9ecb32/t/5fd75570ab77727176ac8444/1607947632701/sample_assumption_of_risk_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc314161972c46e3c0365f8/1606620182465/45236355693.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe4f069ee0f32b87215b46/1606307591817/sawenetozafovej.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/71829551031.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/greeting_card_templates_free.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_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 5484 bytes
SHA-256: ace8e3df3e49d940d2d2a58edb66059ecca9375a08f5b8658eddc9cb3c20ec4f
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 12844 bytes
SHA-256: 55791a00eb0c106521a9266851066902f6058185b2c03a010bdf16b5845f5c0d

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