Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d08aa277be0ad35…

MALICIOUS

PDF

64.4 KB Created: 2020-11-14 12:21:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f13211ee8068c585d1dbc25903f52733 SHA-1: 93a1939123a27b73efc612b4e751e3ed9bffb5c5 SHA-256: 5d08aa277be0ad35a57f5cd891b4516c8fb53867fed0f05dd1c9e51db70762eb
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a repair manual. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL suggest it's designed to redirect users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=electrolux+power+nozzle+repair+manual
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f8f5b213170c.pdf
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f94bf1ba80a0.pdf
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fa5c088373aa.pdf
    • https://cdn-cms.f-static.net/uploads/4444856/normal_5f9c9949d0de5.pdf
    • https://cdn-cms.f-static.net/uploads/4383444/normal_5f97125d0ce2b.pdf
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5f9727fd58d97.pdf
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f91bd871fe31.pdf
    • https://cdn-cms.f-static.net/uploads/4453332/normal_5faa277881a73.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vigevot/duropokivofajewosujamuw.pdf
    • https://s3.amazonaws.com/xanebavifamopez/zofeluforekuj.pdf
    • https://s3.amazonaws.com/muxegeza/wibosedavubaxudok.pdf
    • https://s3.amazonaws.com/tibitexil/sijipefitu.pdf
    • https://s3.amazonaws.com/jubiferekaka/acidosis_metilmalnica.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c16b.bin
1fb3aac5fe5f6c68636c8965f1fbf1a124d4d8b02ee52af310431c5652aa039d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC16B 5068 bytes
font_01_sfnt_off0000d2b7.bin
a54bd55f3fba82e814af83614be4ad01c4c13b81c6dda96041ff8f8e9bd43622		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B7 10028 bytes

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