Malicious PDF — malware analysis report

Static analysis result for SHA-256 36727d7521b3ec93…

MALICIOUS

PDF

68.9 KB Created: 2021-02-25 02:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ff292996185660e104d58fc6359d474a SHA-1: d9088ac75b792a4e3d0c72a3aee1f64740a0158c SHA-256: 36727d7521b3ec9380ca1c3979b31be10d07e673eabe559edded679a5cc46295
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://yafferge.ru/award?keyword=sigma+1009+sts+manuale+italiano In PDF document text
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/pulurulisasofoj_gababup.pdfIn PDF document text
    • https://kurenilomu.weebly.com/uploads/1/3/4/0/134042522/zujegedadofubazuro.pdfIn PDF document text
    • https://xidaxawefitorat.weebly.com/uploads/1/3/5/9/135958331/ximefirat.pdfIn PDF document text
    • https://woziwapimarezex.weebly.com/uploads/1/3/5/4/135400795/0cc2b1d9.pdfIn PDF document text
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/2aa1e6aa3.pdfIn PDF document text
    • https://putumilaw.weebly.com/uploads/1/3/1/3/131380263/ca680a44d.pdfIn PDF document text
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/9d38e28d406.pdfIn PDF document text
    • https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/tevuruwegetivu.pdfIn PDF document text
    • https://xumififofuga.weebly.com/uploads/1/3/1/3/131381048/fojamawuduzital.pdfIn PDF document text
    • http://paselon.getenjoyment.net/how_do_you_type_the_beta_symbol_on_a_mac.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/2014_jeep_cherokee_owners_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wibukosumasej.rf.gd/39727311041.pdfIn PDF document text
    • http://kenavegolixase.epizy.com/human_anatomy_circulatory_system.pdfIn PDF document text
    • http://vofiwevo.epizy.com/topumavidaziboxod.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_off0000cceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEB 5364 bytes
SHA-256: bbc8f439ec422965b41e603e03d187f9cd74f27141b068bdd05acef95444e270
font_01_sfnt_off0000df19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 12436 bytes
SHA-256: e645152a96740bd222bb78fa4b858e980b28ecdde517b270743a9948a7e8a12f