Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c50f3bdea4bfe4…

MALICIOUS

PDF

60.0 KB Created: 2020-12-18 00:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0c74945c2debfc8cdfb817569647695a SHA-1: d78d96ed628930385af80f2e886b5cbcb5d08e0b SHA-256: e4c50f3bdea4bfe4eaa53c8a3f113c60442b820a4de5e6a7848adf0514938d10
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and ClamAV detection confirms it is malicious. The document body, though heavily obfuscated, suggests a lure related to a 'service manual'. The embedded URL is likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffset.ru/123?utm_term=mpc+live+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458615/normal_5fbcc962b9ba4.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/nuxulikiwab/b._ed_scholarship_form_date.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ce8ac6d964583621afbb/t/5fc24d763485235c861222af/1606569335057/city_under_siege_movie_download_in_hindi_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/56366132081.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59cdf16f6d44b07de9ac5/t/5fd1f941ad61ab58318ecf3f/1607596354983/13567235017.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/24145406650.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/81375510265.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/kefigugafevurun.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/90128286119.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/22501871660.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_off0000af4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4C 5144 bytes
SHA-256: 803749c07774c42d60b40aca7c47abf1d38322bbc5b5b8850c04e9ebe29cd54c
font_01_sfnt_off0000c0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C8 10272 bytes
SHA-256: f0fdcb0af12a7db8ee1fdca9e1fd7852d720093842a770b770e9d3dae0db4724

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