Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce663bcfbfc2ce9b…

MALICIOUS

PDF

65.2 KB Created: 2021-02-18 07:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8dd4d162045c05899a337531c9cde493 SHA-1: d0d7ecb1e5fefa01031b2d131d13beedfa59b8aa SHA-256: ce663bcfbfc2ce9be084e635bee4695cd580a6fbeed610647016ee19652dba26
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, with ClamAV identifying it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/123?utm_term=mossberg+590+tactical+stock+uk PDF link annotation
    • http://vafakewa.iblogger.org/incident_report_format_for_employee.pdfIn PDF document text
    • http://organize.shop/how_to_use_a_rv_microwave_convection_oveniv5ii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_5fd75096541c4.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/3Xjcjh6/jotaxoruxidemopid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_601901e028549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_6009d8c6c955c.pdfIn PDF document text
    • http://eagleaff.com/64173943133htzdj.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/idWWyp0/merge_dragons_how_to_get_life_flower_wonder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_602ce0ad61f49.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/rusiwifomalaral_migekijomabinuz.pdfIn PDF document text
    • http://moshon.space/1233922777625pll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_600c7d5294f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_5fd813cc67470.pdfIn PDF document text
    • http://icub.tech/jobodasasivafanimepanealy.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/Gghjcgg/davos_travel_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368756/normal_5fdf887f8787a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372753/normal_5fdd224ab5eff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dixadenidufudu.epizy.com/gomipubudovikuxudaxew.pdfIn PDF document text
    • http://xafamikipu.epizy.com/jacket_design_template.pdfIn PDF document text
    • http://wipitawakewemex.rf.gd/pamike.pdfIn PDF document text
    • http://gawivofeb.epizy.com/vicroads_learners_test_answers.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_off0000bf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF83 5596 bytes
SHA-256: 886802d2cfdc78c2759b47024c3fb449e05c94e71a7e134ef45d7492fda7eaa3
font_01_sfnt_off0000d2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AC 10408 bytes
SHA-256: 77eb1b9b761bfd97a146dfee7be9bf857f8e39fa18340254787767f6d5d30f08

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