Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fd3ac9f7c20a61…

MALICIOUS

PDF

121.9 KB Created: 2020-11-13 04:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d4a853ab1282cfbaccffbb8f5497f8f0 SHA-1: 3d2f37e1632fe1dd290e4fb51058b6386c29e186 SHA-256: 48fd3ac9f7c20a6175936e54f2e73aae013efa31fd4a87abec0ede9bce863b2b
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 as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to technical specifications, likely to trick users into clicking the malicious link.

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://trafftec.ru/123?utm_term=mode+1+fracture+toughness PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f8f1c05264c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5f98dbbd553d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f9e128091e7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5fa7c59f0ad60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_5fac06e62c5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f89c2a2e0528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f8e1d2a21738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f912ea414773.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/nozazodivin/sojowurudawebeviw.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/bell_s_phenomenon.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/zewax.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/12956212357.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/employment_application_form_california.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001820c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1820C 5308 bytes
SHA-256: 9828cd7abdac7806e3f07451f4aa5fd965e09d22370b9a5649465aa98a4ea27a
font_01_sfnt_off00019425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19425 14616 bytes
SHA-256: ec56e1b0d48cd19a086960366de634847b3be74ad16b1af372cf188d661bb53e
font_02_sfnt_off0001c4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4E4 16292 bytes
SHA-256: 0266027e20cefbb3db4bef3740e6857ef147baa19e9fc42b0b2b5a590cd03c70

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