Malicious PDF — malware analysis report

Static analysis result for SHA-256 797c5f785707845a…

MALICIOUS

PDF

86.8 KB Created: 2021-02-22 03:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b7f215600bad5cd867251809f8982902 SHA-1: 56e35fb9c927c546cd59773dd5f44e5fdc22d81f SHA-256: 797c5f785707845a6a50cec93409e1e6dae4dcfafb5cf9ed2d6049357fe70d94
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. The document contains numerous embedded URLs, many pointing to disposable hosting, and one prominent URL is presented as a search result for a popular TV show, suggesting a lure to a phishing or malware site. No scripts were extracted from this sample, but the PDF structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/strik?utm_term=wu+tang+american+saga+episode+6+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426676/normal_5fffb8fb1984b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_6018ea5c5fb4d.pdfIn PDF document text
    • http://autokenn.com/logitech_z323_manualv0dfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382771/normal_60037e28999de.pdfIn PDF document text
    • http://tacfitproducts.com/transferwise_money_transfer_ratecznfe.pdfIn PDF document text
    • https://kogafisefog.weebly.com/uploads/1/3/1/4/131438876/dufuguruwemukavikes.pdfIn PDF document text
    • https://monaxakapivelor.weebly.com/uploads/1/3/1/1/131164425/5736f0.pdfIn PDF document text
    • https://mijujatojiso.weebly.com/uploads/1/3/4/7/134701577/nisezufitonunu-womotiga-zovupali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_5fe8952e86be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_602baaf087445.pdfIn PDF document text
    • http://world-wild-shop.com/2229852311274eui.pdfIn PDF document text
    • http://vvinorama.website/puwilubejokevoboxebakiluhf4h7.pdfIn PDF document text
    • http://rineset.xyz/317151454064q3zs.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/radiviritonawogaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://disefubukub.rf.gd/xiferedebefunokazelibote.pdfIn PDF document text
    • http://gedawov.epizy.com/substitute_for_phthalo_blue_green.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/adtran_netvanta_1638p_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/78458618813.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/subtitle_descendants_2_sub_indo.pdfIn PDF document text
    • http://lotarikavim.rf.gd/kotokokid.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_off000111b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B4 5612 bytes
SHA-256: d97c47ca7c666fbfb78d08b24f883945e38502cd1c1a79fa190564e645624b18
font_01_sfnt_off000124c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C6 12092 bytes
SHA-256: 858d1059d04e3326d805b1c53e6084cf959f0956755117e0e13403513e64896e

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