Malicious PDF — malware analysis report

Static analysis result for SHA-256 381f71a93316656d…

MALICIOUS

PDF

67.7 KB Created: 2021-01-09 06:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1d23514aa2d76bf318fc846f632c4de7 SHA-1: c0775c90dfed55e5aaa147013da3784994052290 SHA-256: 381f71a93316656d444df5bfcb7f3e6ef9b2c2cc71a27a46e7c848c3afd4026e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI and the malware detection strongly suggest a malicious intent.

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://trafficel.ru/123?utm_term=db15+connector+pinout PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f920835603d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f911c3391a6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5fc5837c91e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5f8f7719415a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f8a19ba45877.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5ff2876519871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5fe5eebc8ebd0.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/Xx4PShj/marvel_pinball_free_download_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419192/normal_5fdf053970fea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fe90efb7dae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491437/normal_5fabffc7aaad6.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/fojaxexino/46635961575.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/88179915720.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/mibekulazuvotuk.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_off0000ce00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE00 4824 bytes
SHA-256: 7b40ab0bf20ed2d4e4090c440dfd2bf5ffa788ab4ff37a1af92016afce54eb06
font_01_sfnt_off0000de86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE86 10492 bytes
SHA-256: c5defb118bcab46c025f31ee32615a36e1a238f1a145134c58be6ef100c49a5b

Open this report in the interactive analyzer, or submit your own file for analysis.