Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02e4d717cf94214…

MALICIOUS

PDF

86.5 KB Created: 2021-03-30 14:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 315d156c2650581f7a8d6137b862f59c SHA-1: 91bea0bf9f7cd3535dcef9ea7e3314b423e98c9e SHA-256: c02e4d717cf94214a4eeea1462d81363837756279b2b15e83e80bb45023900f5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a high heuristic indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://lozipotod.ru/award?keyword=pilates+na+hernia+de+disco+lombar+pdf PDF link annotation
    • http://vumamanepu.sportsontheweb.net/94403750735.pdfIn PDF document text
    • http://help-business-media.com/49553372833b8ree.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/relation_between_electric_and_magnetic_field_in_em_wave.pdfIn PDF document text
    • http://allieshouseofhope.com/how_much_does_emr_software_costg8fc5.pdfIn PDF document text
    • http://pomirkapa.site/lunurarifafukevewaxuljiu26.pdfIn PDF document text
    • http://about-igsupport.com/linefuvanuzavlw2hr.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/candy_to_word_convertor.pdfIn PDF document text
    • http://gewututikame.getenjoyment.net/how_to_edit_a_png_in_inkscape.pdfIn PDF document text
    • http://ecoservice-vlad.ru/the_lost_books_of_eden_free_downloadda5fw.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/craftsman_7-1_4_in._miter_saw_with_laser_trac_manual.pdfIn PDF document text
    • http://idealicaufficiale.website/baines_high_school_uniformq2h15.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/32744217352.pdfIn PDF document text
    • http://zagavogafewakud.iblogger.org/netflix_serie_en_laptop.pdfIn PDF document text
    • http://sosed.market/39282275131cotbo.pdfIn PDF document text
    • http://organize.shop/blood_on_sheets_hoteltlanq.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/xuvexulufarize.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://misowajonubajoz.epizy.com/kalnirnay_calendar_sep_2020_marathi.pdfIn PDF document text
    • http://vuwotona.epizy.com/jaxaxipevuzolawa.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/59579249606.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/hadoop_yarn_tutorial.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/rulogewitekuzisezenojumol.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/instructions_for_cleaning_keurig_2.0.pdfIn PDF document text
    • http://gorokezawofor.rf.gd/xegijemoxaw.pdfIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/dizevafubowi.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_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 5324 bytes
SHA-256: 9a81ac4c0784fcfe2626588a945641e4fefb59e7817f541a901db106d59c3625
font_01_sfnt_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 13500 bytes
SHA-256: 118b2a3f69a9b77ed6a7409c7f26e5ced5ab1ca061059ff5d94f9af600e85839
font_02_sfnt_off00013c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C90 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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