Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d6cecd9f646ff2…

MALICIOUS

PDF

85.7 KB Created: 2021-06-11 23:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 11111ea8c0dc5a74cbf0fc442b5b835f SHA-1: 3c04b805afef2b3b6a337d17013536dd73c83570 SHA-256: 63d6cecd9f646ff2f9de9dcf82fdb68a35a097cbd13e888a6d6f466ddd904c7d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that likely leads to the download of a malicious application, disguised as 'phone settings app download'. No scripts were extracted, but the presence of the malicious URL and the overall detection strongly suggests a phishing attack.

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://queure.ru/pbw?utm_term=phone+settings+app+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424645/normal_60075dad4fb3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459784/normal_5ff104f463d14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5fda6d5420f8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_604e6147314d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416938/normal_5fe5d43c035c3.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4411493/normal_60b3ef13e9fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_60bf18f8e0cab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418777/normal_5ffd24a62ba3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_60081c4f99ec4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5ffac3a94e0c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468267/normal_6002656ba0f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465277/normal_6050f7b7513e2.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://uploads.strikinglycdn.com/files/f7f17623-ebe7-48a8-b176-38b36c36b0a3/91094270451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e34046-f90e-43d0-b872-7e107dc38eeb/febepaseko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638524b1-8168-492c-bf2c-c75659078223/82670865852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac3f5c1-b537-47be-a765-3f41c7cd9521/animal_farm_movie_1954_vs_1999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45eaf40-99b8-4d6f-9b3e-1ce9c8741030/94382033418.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_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 5008 bytes
SHA-256: 0fd3cafaa94d70473151904c2cd6196bc4087ed80357f09cfcdcc9c0bda90392
font_01_sfnt_off00011693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11693 10888 bytes
SHA-256: 2b15aa908664d8d487c8af51c4b0f7e370635d8165d1d05df76f9638d2ad038f
font_02_sfnt_off00013bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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