Malicious PDF — malware analysis report

Static analysis result for SHA-256 596286fbd032d581…

MALICIOUS

PDF

97.9 KB Created: 2020-12-30 11:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0b82220b6588bde2aaa305428b5fe121 SHA-1: 18112e82b3687d25df547dd359906eea3d5599c2 SHA-256: 596286fbd032d581d1feb4cf0becd4ebc2f11502835b0a8acc18b8a41ed35f9c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to malicious sites, likely for phishing or further payload delivery.

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.
  • 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://traffking.ru/strik?utm_term=tic+tac+toe+game+python+3 In PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/tixifulefenabezapuw.pdfIn PDF document text
    • https://nigupisotaku.weebly.com/uploads/1/3/4/3/134374455/3843244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d71d2d0-4272-48ad-a4da-59c924653e38/greenleaf_spin_off_lipstick_alley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21472de-7a83-4d17-81ab-5d7ebcb2cbab/watefawigeliviroladalid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71719fcf-89b8-4765-8525-80939f36a92b/21240036228.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/school_cover_page_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/91835010408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/492a6563-3918-45b4-a957-7e1d461fc186/club_ez_fit_group_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/gufurozujumirenuxumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1e0c32-d5a9-49f0-b91c-55becefb1c59/inches_to_circular_mils.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2e7414-975f-4daa-b7a0-4e08e4765a12/the_basics_of_social_research_7th_ed.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/81935429761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31198c9-1722-4a5a-a8d2-453864a37d77/filuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1def49-44d5-45db-b4e0-31735989f990/piko_blx_evo_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cb2d26-711b-4bc8-89ff-44044026edeb/44207406761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4760296-0009-4cf0-9ccf-646f502da614/xidirut.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/weneralewesixa.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_off000140f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F1 5256 bytes
SHA-256: 8a834b5cdda3e1fa43648cbf0978de9c7eb7eaba0c0a38ee143a8d6ae5dc8334
font_01_sfnt_off000152ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CA 11164 bytes
SHA-256: 9c4819003549aee76eef6610a308748c4e72f2258d87b171cfb56e220b028625

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