Malicious PDF — malware analysis report

Static analysis result for SHA-256 c201ae5414375cd1…

MALICIOUS

PDF

80.5 KB Created: 2021-04-04 19:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 782007a6df9f891f31fdeb8c068b4eee SHA-1: e9d484730620a5f084c026db793ac91aa64b0001 SHA-256: c201ae5414375cd1b4d493422580bf3d746b0214a90da46c0ed02b7335dedcf1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. 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
  • 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://dugedepap.ru/strik?utm_term=maze+runner+3+movie+plot PDF link annotation
    • http://demask.space/3145402709923fbg.pdfIn PDF document text
    • http://unonatur.space/fuledo8u6nt.pdfIn PDF document text
    • http://albatros-trans.ru/data_analysis_template_in_excely7vqp.pdfIn PDF document text
    • http://kameregeperiwaz.22web.org/7705504371.pdfIn PDF document text
    • https://rewekofewu.weebly.com/uploads/1/3/4/6/134654248/ruzuzosed.pdfIn PDF document text
    • https://wujupeduluruwuv.weebly.com/uploads/1/3/5/3/135316277/xagimejomiderebo.pdfIn PDF document text
    • http://garantiya62.ru/741749919125ynpq.pdfIn PDF document text
    • http://guburifesujera.22web.org/bluestacks_tas-_ix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tenubitifane.rf.gd/vufiv.pdfIn PDF document text
    • http://tekaxipi.epizy.com/82616098224.pdfIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_92e06f6a8cfc411eae3cc1ee363876ca.pdf?index=trueIn PDF document text
    • http://lafatakijuton.epizy.com/soxatu.pdfIn PDF document text
    • http://fetuteg.rf.gd/95257878367.pdfIn PDF document text
    • http://bedawisanono.epizy.com/kukoteli.pdfIn PDF document text
    • http://gejonutopufone.rf.gd/50567514887.pdfIn PDF document text
    • https://fac7854b-22c3-40b9-bef9-ee94a55a010d.filesusr.com/ugd/fba82c_d987829705914daf8a7398a9ae512987.pdf?index=trueIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_95a2194052e94fbc841de7280fc9b197.pdf?index=trueIn PDF document text
    • http://lukugebov.rf.gd/rigilufesusesixunamufo.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_dee67b55a2d24e02aeaf1db5650bc71a.pdf?index=trueIn PDF document text
    • http://betiger.epizy.com/checkpoint_4600_datasheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 4948 bytes
SHA-256: b347e15ee519573907131b00eb396660421768d7af7495a0e4ec8c83bfab6014
font_01_sfnt_off00010106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10106 11228 bytes
SHA-256: 32b4fe70661acc58e8f3c04ac320cbd1067c31adeb394822fef022ccfe9a7bf6
font_02_sfnt_off000126b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B4 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230