Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9e2b45ab9003bb…

MALICIOUS

PDF

84.0 KB Created: 2021-05-16 10:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0949b37dba634716ca10ee4edc438ebc SHA-1: 2cbda19f8290b0e843cb52318c7733b8d88c3246 SHA-256: 5d9e2b45ab9003bbf9d893aaba498275c3a182ccf636e7b2ddedf2ee1dba2577
186 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to various external resources, including one that appears to be a phishing lure for movie downloads. The presence of numerous external links and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=fifty+shades+freed+full+movie+download+in+hindi+300mb PDF link annotation
    • https://cdn.sqhk.co/nexapebevux/fG8ge5p/33361888680.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/dgwhdAb/kiki_s_delivery_service_book_series.pdfIn PDF document text
    • https://cdn.sqhk.co/mozulunilex/nA6LfcL/buvefidukegagofenagidub.pdfIn PDF document text
    • https://cdn.sqhk.co/jisogixij/1giMRia/cardiovascular_examination_osce.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/analog_multimeter_specification.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/g4Imib4/starcraft_2_cheat_codes_vs_ai.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/5ThheWR/cheap_mechanical_keyboard_with_hot_swappable_switches.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/regional_rural_bank_syllabus_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/z0jaCjf/zojonaxumamojunepi.pdfIn PDF document text
    • https://cdn.sqhk.co/fupipevu/fEbhbjh/lesson_plan_format_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/VhbTHRj/batonilugeri.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/dovulavavo/pufalinubamowepa.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_8e1dab8f14f7430fa7a22dfdfd40fad8.pdf?index=trueIn PDF document text
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_91d962c73e384b91b0d304244732b43f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taguxif/lakuzoj.pdfIn PDF document text
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_0e3cf04cd4d840b4a6de10d0a0c12157.pdf?index=trueIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_673db861fad04e7291641f01d5f897d3.pdf?index=trueIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_6525ec91c83542b3a4b337949585d514.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/nojudixobezif.pdfIn PDF document text
    • http://viwefar.rf.gd/adjectives_explanation.pdfIn PDF document text
    • http://fazobelo.onlinewebshop.net/texto_narrativo_breve.pdfIn PDF document text
    • http://labotiz.rf.gd/testo_junkie_discussion_questions.pdfIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/ronarepozobugakonododak.pdfIn PDF document text
    • http://sizokipizap.rf.gd/lexogizezenur.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 5804 bytes
SHA-256: 0ec2402a3260df35acd5cd2010d990caba4be962fab712cabc4d161e0cf41cef
font_01_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 11352 bytes
SHA-256: 086e727c3c7c77cb453036b85d9ee01f5ed774e5c0bde103569f413f2eab4f70
font_02_sfnt_off00012c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C85 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8

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