Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa966892ccdd56e…

MALICIOUS

PDF

76.9 KB Created: 2021-02-23 00:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0939b60e09d023bfd0e4953c4cdf57ed SHA-1: c0f8fe5015e6a0787be22a76a450dcdf379e1d84 SHA-256: aaa966892ccdd56e8ea98f1c5fbf6ac6bfd570e42db4d7946645c3ad3bd6cf55
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high probability of maliciousness based on ML classification and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to a 'programming manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=thermo+king+tripac+programming+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425929/normal_5fc7766abb9ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372086/normal_5fcdb96ba6a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493890/normal_5fe7cdea40caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_60244d6b52d05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fe1caae65760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420745/normal_5ff5f5321533d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_5fe80d0e180d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fe66ad343ad9.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://s3.amazonaws.com/kexamoxusinixu/gofiniwegudenuwodi.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/tanomo.pdfIn PDF document text
    • http://wixufoliwesomep.epizy.com/shirt_template_design.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/fleshgod_apocalypse_oracles_piano_sheet_music.pdfIn PDF document text
    • http://kuwofeboxe.rf.gd/bizulig.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/char_broil_professional_tru_infrared_2_burner_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/rewitigirifepik.pdfIn PDF document text
    • http://maxegore.epizy.com/pamenegubipovulafomedoje.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_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 5064 bytes
SHA-256: 87f915ff7154e5e27ea5cf64d4dd92137b8338eec944c2deb2f039d080167767
font_01_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 10492 bytes
SHA-256: 26274602b15d40fe4d6550c0daf72854e2059a18a2e58c7d8cb4e102916f8ee6
font_02_sfnt_off00011834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11834 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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