Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc73dd002c71dfc…

MALICIOUS

PDF

66.6 KB Created: 2020-12-20 17:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0602ca899622c200262efa49e901c16f SHA-1: 3c3c88b249c5bb49ce4d10964232dd3292afdae0 SHA-256: 1cc73dd002c71dfc9ec72ae086217e2988c16363706c389efe43c5e5d39ce7c2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. ClamAV and ML classifiers also flagged this file as malicious. The document body, though heavily obfuscated, appears to reference a manual, likely serving as a lure to encourage clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://trafffe.ru/123?utm_term=briggs+and+stratton+500+series+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426087/normal_5f9c52592f7e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454988/normal_5fdd2f7d58265.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/4c67849a-0f3d-4379-9f51-81753e58dcc7/12050853239.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/92231005406.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/vogopumozowaloxi.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/badshah_the_don_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/financial_statement_audit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f65040-c2bb-4d6c-beec-064dd164f09e/malavupezudanivuzusabi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/preference_share_capital_in_balance_sheet.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_off0000c6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A7 5460 bytes
SHA-256: 0ec327fe0b27ddef2eb6a1ad3db51afeba8e67b2c7f3d332d561829514ad9b1a
font_01_sfnt_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 10876 bytes
SHA-256: 7e0bcbe98e726c7eea2d62edfe65ac4cb617ad8c823714723f18cbd88573b0bf

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