Malicious PDF — malware analysis report

Static analysis result for SHA-256 544c792254b20aa3…

MALICIOUS

PDF

71.2 KB Created: 2021-06-03 10:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 97a2316aca5e0c36743f82204b13dcf4 SHA-1: f43471d5469e161348a30e839124d8354176aebf SHA-256: 544c792254b20aa367c663d3b29cea9022d1aac55a37ac5021fbe57b02aaef08
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a movie, a common lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pixomot.ru/pbw?utm_term=grandma+got+run+over+by+a+reindeer+full+movie+123 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475719/normal_6007b15ab69a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_600e5559de3f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469836/normal_6001eb394838f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_6041af85b876e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470825/normal_5ff7f147d807e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ffefd1210ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_606965f739682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_605a28dea7d88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_60584e171792a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_6004b1440df95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5fc67e448710d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476939/normal_6022a05230726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0565d6-5092-47a1-8104-35bc709efb9b/pikabiduvijifup.pdfIn PDF document text
    • http://garifukedako.pbworks.com/w/file/fetch/144426777/33885078425.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144420921/how_long_is_the_osha_10_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df33884b-3424-461e-8d7d-d66999ce4b38/1649777921.pdfIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144516942/zusabiliju.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/one_block_wonder_quilt_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c9d835-bbbb-4071-b0e4-8449ec72ab6b/philips_respironics_simplygo_reviews.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/f/58604825447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5553577a-5656-4312-be63-e51674dcaa1d/gapamoxagijemezenuzuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d42d1de-41c5-4880-984a-fc5e0f240cc8/dragon_city_ancient_world_breeding_guide.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_off0000d3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A0 5728 bytes
SHA-256: 332876f05765344244956513b4262fba1447d179263e00189899a417ead47378
font_01_sfnt_off0000e726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE726 10992 bytes
SHA-256: e00bc752179a705e8c1c0a07f801da8c32812e068a06e13ecdee711c3c9c7973

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