Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdc4ae30ded6b89…

MALICIOUS

PDF

74.8 KB Created: 2021-04-20 03:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8981091b1df1173a5000aff4a826926b SHA-1: 535c68d075bc3414fb348f225f2a1d118dbcad2c SHA-256: 7bdc4ae30ded6b8982b17bbdf878de807933cebefd785ddb35ec6bb2fd971c6c
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with the primary URL being 'https://dugedepap.ru/strik?utm_term=gmat+official+guide'. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URI point towards a phishing lure designed to redirect users to a malicious site.

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://dugedepap.ru/strik?utm_term=gmat+official+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405194/normal_60252dca48635.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/7339362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404983/normal_60065da7b2482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530578/normal_5fcd7b1254b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450519/normal_601a00dc98d53.pdfIn PDF document text
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/wetuv_mimavis.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/5049549.pdfIn PDF document text
    • https://pebarefilegiz.weebly.com/uploads/1/3/5/3/135325086/2320dec50b6c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_605b9dcf49638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_6062e4870b7a6.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/wewiro/49971238358.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/ledudesapovidatozemoga.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/zikoroxetupipef.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/katojibuwinalegofol.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/muzokokuzugos.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/46594497458.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/marvel_movies_in_order_to_watch.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_off0000e6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C6 5096 bytes
SHA-256: 43ffed78babb3edd31bba622bf73083bdaba16bbcba99641333df17af52740c5
font_01_sfnt_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 11388 bytes
SHA-256: 94b6aa7c49eaf301a049508b2e60783802d79bb25977f2ecb22796e8878c2845

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