Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9df2a72601560c1…

MALICIOUS

PDF

96.3 KB Created: 2021-01-08 08:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2fe7699a75d8d9dfe68e8e96bbbb25f1 SHA-1: 879e649b3c06869e278ac89490ff0e5b205192bf SHA-256: a9df2a72601560c1f89fbd8130dd767a62d9642d63629e52caf559f85d19504b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ClamAV signature and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or social engineering attempt to trick the user into visiting a malicious site. No scripts were extracted, but the presence of the external URI suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=thin+layer+and+column+chromatography+lab+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445129/normal_5fd5f392e6585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464068/normal_5fe56bd91134e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f906fbe9ed2a.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/089e58e0-19ae-436b-8512-2b00ad788c61/matlab_commenting_multiple_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/popumagekesamumikabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d12c433-c77f-46f9-a5d6-511a51f4943a/the_power_of_habit_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/68560536225.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/quantitative_aptitude_sample_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/awlgrip_545.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/english_to_spanish_translator_for_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040f287e-9bba-4bcc-8801-327ad1852ccd/minecraft_pe_12.0_apk_download_0.16.0.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/85122700852.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/20810910804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54298c2f-c4af-4683-8648-425205b9d08b/92820059083.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 5384 bytes
SHA-256: 2cba86291194a2164c7bc2b4cb27dfb7a47b91c53ae0d11861b827b7164b8b21
font_01_sfnt_off00012a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A31 11144 bytes
SHA-256: bcf268063f79c5476a38f978f0b986b25d8344b7c20f8b7884e11bd78742d2b8
font_02_sfnt_off0001502e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1502E 16148 bytes
SHA-256: aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080
font_03_sfnt_off00016524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16524 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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