Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b548fc7a9bf511…

MALICIOUS

PDF

63.1 KB Created: 2020-11-26 02:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e1d7deb483c90bc722bdb1f654700106 SHA-1: 9d91df58dc8478a05fe348c3cac0b3a1bfd7c381 SHA-256: 42b548fc7a9bf5116702095b6fe0aea8da467a7c40b93a5197b6938c345227be
162 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. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/strik?utm_term=peg+perego+tractor+12v In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9636ffd497d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f8d2d161861d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5fbdee114e0b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5f9a3e5a499e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420028/normal_5f9c7d9de06c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8cba743752b.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/liwara/mesevonudipumikevonupom.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/abecedario_japones_a_espaol_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/22169180617.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/fall_foliage_report_connecticut_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/95382666469.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/corvette_assembly_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/4th_grade_math_spiral_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/angel_banishing_symbol.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/the_trumpet_of_the_swan_trailer.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_off0000b76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76B 5136 bytes
SHA-256: ee9a341e30126c37cb871649ddbc4858f8a2086f36ebb9984a02345233eb76e8
font_01_sfnt_off0000c90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90A 10996 bytes
SHA-256: 1d6b3e2f2b9231567b9e2faa1843122be84e997ca1d8c32bf5fc9e0ba4b7ccde

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