Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab5f7829c92342d…

MALICIOUS

PDF

68.2 KB Created: 2021-03-08 17:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e790df10e125c29e15430fe3fff08d5 SHA-1: a3f5c65b74d2f085a9e3202ec12e2c1d1fe788d6 SHA-256: 0ab5f7829c92342d58be1f45ce4f60f3c5e71b8854f2449098dc3b67550480b7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://seumenha.ru/wix?keyword=casio+fx-991ex+plus+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fe236de6ff38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_601798f5e4e2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404969/normal_5ffbbb3ca48d3.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/8a8ab.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/how_to_troubleshoot_water_heater.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_6022486580040.pdfIn PDF document text
    • https://xudagemiribu.weebly.com/uploads/1/3/1/3/131378943/jekagozej_todezaleluredo.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/ligedizok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_6017124849934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://samupuvigerolo.rf.gd/50071498286.pdfIn PDF document text
    • http://bufiziwo.rf.gd/95477384694.pdfIn PDF document text
    • http://wexipara.rf.gd/boral_steel_roofing_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73785eb-a2fc-48c5-84b3-da24b0033463/33678207223.pdfIn PDF document text
    • http://webixulibuka.rf.gd/is_gmat_really_tough.pdfIn PDF document text
    • http://ropurudowilume.rf.gd/67718594553.pdfIn PDF document text
    • http://tekudadi.rf.gd/elmer_s_glue_all_msds_sheet.pdfIn PDF document text
    • http://figedid.rf.gd/scientific_publication_citation_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ac5356-e5ec-421c-b0a2-8c9ffa36a1bf/pagina_46_y_47_del_libro_de_historia_5_grado.pdfIn PDF document text
    • http://tuzuvas.rf.gd/biw_design_course.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/45485973405.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/21091263868.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/scorch_trials_free_stream.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEED 5164 bytes
SHA-256: 5c12ca5ba678faca9ea7a5308290842cd69ce8cdce10ebaa847ea78fe4718025
font_01_sfnt_off0000e07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 10280 bytes
SHA-256: 662573edefcfb63229061fec174ab403dd4b037e852577517a815ef2bfeef2ae

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