Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38f80c49439caee…

MALICIOUS

PDF

70.9 KB Created: 2021-01-08 03:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 63f495bd234773de6bf41232a3d768fb SHA-1: 5611448c0f9215fcdfe650d76e1f5afe1da23e83 SHA-256: c38f80c49439caeeef8a32f5998d28ca2cb492aadb418c0fcf8259f79090247c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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=nok+hockey+puck+dimensions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f98b40fe6a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413735/normal_5f9494feabf91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_5fb90d8eda900.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_5fef50e0a7cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5f8f184c70e5f.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/zupenafud/companies_act_2013_in_hindi_with_amendments.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/honeywell_fan_coil_thermostat_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/82460882428.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/vinacafe_coffee_sugar_amount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23894f5-547d-46ce-a189-fd2a99881fee/rpg_mo_weapons.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/praying_for_time_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/magicseaweed_croyde_report.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_off0000d7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FF 5112 bytes
SHA-256: 099fab5344398761d670d041202d686a2dfd0aec7419f88f43c7c30b0bcb87f7
font_01_sfnt_off0000e955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE955 10988 bytes
SHA-256: 98dbfb47aa7021c41122c98155c45ba144de7855df064d8e05624ca8b4a9b34f

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