Malicious PDF — malware analysis report

Static analysis result for SHA-256 88562e081b87a8e6…

MALICIOUS

PDF

63.5 KB Created: 2020-11-24 10:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e4c77c472d0821ac7b7190d466a0a4d6 SHA-1: edf4e5caa85299aa3219acf80e1f42aa1f778cc4 SHA-256: 88562e081b87a8e69802e6d6a916f9f91c914e53c85a17511b1532783454f3ae
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 'https://traffking.ru/strik?utm_term=logitech+g11+keyboard'. This URL is likely used to lure victims into a phishing or malware download page. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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
  • 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/strik?utm_term=logitech+g11+keyboard In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f948643da8ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f9ee9c468335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5f99417d167dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474205/normal_5fbc7d48ea4f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410207/normal_5fa285c75040d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_5fab13f46f2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5faa39e1071f1.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/gomakobez/savor_the_moment_nora_roberts_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/2nd_declension_latin_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/dragon_ball_z_android_saga_season.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/kediro.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/81517519854.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/psl_live_streaming_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/91686714780.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_off0000ba9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9C 5292 bytes
SHA-256: 343b2aeaf00818db881767714dcb24244b64af973ff04b780866d122e6b31636
font_01_sfnt_off0000cca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA8 10792 bytes
SHA-256: 53ca760b4da81d199f7e7864343e6727052b6d1e03efb6f457210bc824296c83

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