Malicious PDF — malware analysis report

Static analysis result for SHA-256 533dd521f7f013b3…

MALICIOUS

PDF

62.6 KB Created: 2021-01-08 21:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ed95e11269e6c39142c9252eb2943b63 SHA-1: 6e217f53d7fd35615f34d40015fa757a49131517 SHA-256: 533dd521f7f013b37de0a5dca6020bec6dbb6075030c25687d94b78dbeba104c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/123?utm_term=xbox+rechargeable+battery PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454286/normal_5fbbc4ce4d0f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499300/normal_5fad8f734e57c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488101/normal_5fd08d4d5c2c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_5fb7d84cb6509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488569/normal_5fc5645a661b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5f9c962e4204d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5fb835bd2f6f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415292/normal_5fe7b1e2c94de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fb465d83f437.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/vebisop/rose_champagne_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gexixixuda/tamefetiputema.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_off0000b537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB537 5168 bytes
SHA-256: 00f78e0022054e03119e3b767d7d7bdfdc62784ab327062825ac57d44fa46bf5
font_01_sfnt_off0000c6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D5 11112 bytes
SHA-256: e21c387525b98e2a328335611a9b3377d8afb8d96d2330245db2cddbe6f15ba8

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