Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd2de5c2e3bccc8…

MALICIOUS

PDF

75.6 KB Created: 2021-02-08 12:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bacf4dd5dde9d172e53c52a01f99da89 SHA-1: 55041fb88ad62fb61fddb70497bac10815da2780 SHA-256: 8dd2de5c2e3bccc8595ab359b45fc8800187aaa735c2ed652966f197918997c6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL that is likely part of a phishing or social engineering attempt, disguised as a 'deductive reasoning test'. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://druttle.ru/123?utm_term=deductive+reasoning+test+free PDF link annotation
    • https://cdn.sqhk.co/fejavegiwo/aggKPW6/bozutubudirepuxoxup.pdfIn PDF document text
    • https://nekamefirojes.weebly.com/uploads/1/3/0/7/130739169/megagewurasef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4526930/normal_5fe2793dbf431.pdfIn PDF document text
    • https://nipapisowoxodo.weebly.com/uploads/1/3/5/3/135349464/564ff585.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/N0k7iek/10699171276.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/z714hie/18452460900.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/egfgfNc/xozupazopaj.pdfIn PDF document text
    • https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/8467336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5ff224f44a764.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
    • http://kejusekijo.epizy.com/chevrolet_equinox_2017_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/45778019639.pdfIn PDF document text
    • http://xiramubete.rf.gd/video_star_app_for_android.pdfIn PDF document text
    • http://bozisiruvaletun.rf.gd/80048207513.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/pinefomunumupaxinivevori.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/35705088812.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/depreciation_report_for_rental_property_perth.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/6349531522.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/39102963734.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/mamonafonenoxanosopisep.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_off0000dc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC75 5096 bytes
SHA-256: 7fc70275e6f17b9d643de0529e7bb988af1ea0e8b01f91d9f302b6a3cd4b247c
font_01_sfnt_off0000edd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD9 10908 bytes
SHA-256: f9c9e863f5cc79168ddad2ccac20d17fc0b9bbf5e610d116d927adb382da2886
font_02_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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