Malicious PDF — malware analysis report

Static analysis result for SHA-256 0707504c533a5e9c…

MALICIOUS

PDF

71.5 KB Created: 2021-01-16 01:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2653092fd3845197287d719ce5677140 SHA-1: 2e28493c2f3c0d2fc800647093a21697b0001745 SHA-256: 0707504c533a5e9cc6d2c876c66f9c23572b7fee1c03fc21899f3a9d07ecd9bb
214 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which point to redirector infrastructure or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites.

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/123?utm_term=f5al250v+fuse+walmart In PDF document text
    • https://cdn.sqhk.co/jovojatubo/jahbhcd/31639883026.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/d9gjxha/woxevedugizis.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/cSvTJ0f/watefaziwivazetofepipebug.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/agjjhaU/parkour_maps_minecraft_pe_servers.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/magcuia/rudapelelabogufoba.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/gawuwakuvuxemope.pdfIn PDF document text
    • https://cdn.sqhk.co/ditamozulipo/jfjesih/best_camouflage_skin_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/4riegjp/fexin.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/hgchghh/gurigunuv.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/luropi/40878208601.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/2005_volvo_s40_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/how_to_compile_jasper_report_in_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/front_page_of_project_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/super_mario_64_strategy_guide.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_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 5416 bytes
SHA-256: 5e4766b19f9228055a22d344020573c3c02c90e9770a75add850aef1de28dfcd
font_01_sfnt_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 11268 bytes
SHA-256: 57f1856a5b8c873dc3c703661a8a7f966988842a8f606ba553294e095871f651

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