Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d0e6f56300d6ee…

MALICIOUS

PDF

77.2 KB Created: 2021-03-30 03:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2756541b26df781b9f8dfec1a7a8a5ee SHA-1: 1eb4fda5dd47a5f9121dd2326e81bb420043d3f1 SHA-256: 91d0e6f56300d6ee6df825f4769061eda03fd7f7f4101757640170e8a3b7edb9
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that is highly suspicious and directly related to the document's apparent theme of verifying a Cash App account. This suggests a phishing attempt to steal user credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF_URI heuristic confirms the presence of an external link.

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://jacksth.ru/strik?utm_term=how+long+does+it+take+to+verify+cash+app+account PDF link annotation
    • https://cdn.sqhk.co/mudemodox/Tcjjjdv/62773728351.pdfIn PDF document text
    • http://form-copyrightservices.com/kitchen_banana_yoshimoto_settinga32qp.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/bkiciaD/25020789151.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/jltLqhf/word_blocksatz_ohne_lucken_tastenkombination.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/hghf6id/zewamanofi.pdfIn PDF document text
    • http://mangalvpodarok.ru/journey_to_the_center_of_the_earth_2008_full_movie_download_in_hindi_dubbedj808c.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/vipinib/5844262013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9b9d61-2c21-4bf2-ac49-ca7eb55baa40/musejosakeviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368a6362-687f-4f47-bc45-96262506edd4/79674506993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75425e4a-3400-4f3c-bdd2-eeef3921f87b/43960623356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b967291f-dcce-4e03-9df2-15c91ae53fb1/venizixepogon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628111ac-2072-4cef-851d-d90f27c6dd06/xoresidipisorivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f337fa-4983-4ffa-94fa-3f0d372207b3/estndares_y_expectativas_de_matemticas_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2441061b-3647-4be1-8238-97a6df1a4d4a/zusatilulutudamamilowad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a69a99b-55dd-455d-b01e-f6715eb25203/povivojogexisofiwugulosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ea397d-9698-4a38-84ad-136d93996a81/sql_books_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50742ed7-cdcf-4c13-95cd-31990bce95d5/sylvia_day_books_series.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/zulotakojuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57d31ad-b99d-4507-9fa9-ec6254142423/true_colors_assessment_results.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_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 5696 bytes
SHA-256: 087a4947f14cda48207798a87608c0f87cca47719b362974cee4192fa325c63f
font_01_sfnt_off00010296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10296 10876 bytes
SHA-256: b61a5040d17e9c51c2fbb54a3733c5eb123ee034e274e6e1f9111740ccd27f02

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