Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8e7719c7c15801…

MALICIOUS

PDF

79.8 KB Created: 2021-03-13 23:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a377537d27a7e7aa84e1e0d8729aba67 SHA-1: 04f3c93e5a39e39f7643d7d218a95fed31809d85 SHA-256: dd8e7719c7c15801a88d65944e3f6f648bad6caf0d64dfd8d6a1986a5714c383
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to host SEO-optimized PDFs. The primary URL, dugedepap.ru, is presented as a resource for educational material, a common lure for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/award?keyword=atoms+and+molecules+class+9+questions+and+answers+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5fe5582eddec9.pdfIn PDF document text
    • http://begipeg.iblogger.org/weladejuzev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462065/normal_5ff86502e5609.pdfIn PDF document text
    • http://safagiko.iblogger.org/didobuxunanojesotoverogax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6032c62b758d9.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/15082304821.pdfIn PDF document text
    • http://rexirututesopew.iblogger.org/posthuman_knowledge.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/mijumomub/template_for_rescinding_offer_letter.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_26ff92ffc5d740538a3d8aa6a7047b0f.pdf?index=trueIn PDF document text
    • http://tiguvazigavis.epizy.com/birthday_song_with_name_in_english.pdfIn PDF document text
    • http://vejidot.epizy.com/49766760264.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_368b8f6e3e384cdcbe202b27ea15da96.pdf?index=trueIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_4d6d638576124d0f900b745bf9617b69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/nowezepadivojuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/bibovigepiromiposuzusula.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/38181441309.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/are_2015_mustangs_reliable.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/teaching_english_family_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/lamborghini_advertisement_video.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/mcdonalds_marketing_mix_physical_evidence.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_035576939eda48baa7b5401184c138a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/secret_video_recorder_pro_apk_cracked.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_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 5664 bytes
SHA-256: 237d31f24eee09720f8a00cc9cb208285282bd95445fd7d6dec56e1ad75c9452
font_01_sfnt_off00010ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 11128 bytes
SHA-256: 102a07c7f0e25e4540b5e0cc1ba8ee5e288926be8f116873325043fa59a02299

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