Malicious PDF — malware analysis report

Static analysis result for SHA-256 994ccd5b3060fb61…

MALICIOUS

PDF

83.1 KB Created: 2021-02-28 23:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5944bcc814041cd4356505d30a53a88b SHA-1: 8b8da72e87ab9bceecd4925256bde8e84a55b3a7 SHA-256: 994ccd5b3060fb61fd3c7cddc6f11e0e296f06c800f26321a76fe0a45cb504f8
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded external URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload 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://jumiwimov.ru/strik?utm_term=the+adventures+of+augie+march+opening+paragraph PDF link annotation
    • http://lizoguxumugef.mywebcommunity.org/what_is_the_software_testing_life_cycle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_6037942ea7ce9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fdec4919894b.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/newisit.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/foripadovunofozixetarikiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385231/normal_60065302d8c8d.pdfIn PDF document text
    • http://mon-compte-cmb.best/film_basara_heroes_24fn6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_602d095b22455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475216/normal_6036a64e89d97.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
    • https://s3.amazonaws.com/ligole/xigigafeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/journal_citation_reports_2019_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/acute_stroke_guidelines_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/dream_interpretation_spiders_crawling_on_me.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/akaike_information_criterion_regression.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/virtusa_aptitude_test_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/nakawujiwigetedikitavawij.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_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 5428 bytes
SHA-256: 83ffdcc942d9225b9a91fe738d6701b974b983c5e48f6cb9fd5afff1353c2bcb
font_01_sfnt_off00010bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB2 11032 bytes
SHA-256: fb120060d74049e31f630c09a04452d7ed166a23dfd4e96357de3db35d1cc73e
font_02_sfnt_off00013144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13144 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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