Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efe911654b4c7d2…

MALICIOUS

PDF

72.6 KB Created: 2021-03-06 06:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d6c8f2156bd25947e9b1ebf6063e13b5 SHA-1: e2a3450f687133c5051afc1a92f32993e4879e61 SHA-256: 3efe911654b4c7d21244483744df77ffd179ed9214f50c127ecf51b542e70d64
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://crophysi.ru/award?keyword=activate+autocad+2020+on+mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443341/normal_6041c28ae56d0.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/4WQPKsF/rukivenoliniwaxezonixofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_600f043b8f9ca.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/iiaaXf6/colors_of_the_rainbow_in_alphabetical_order.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453901/normal_5fda23d05b205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_600ae6b1e2835.pdfIn PDF document text
    • http://bbflowers.net/40294490208wmksz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fcdac91d2aec.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/fcmKjfv/btd_battles_mods_steam.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/81867351680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470698/normal_5ffe037c826cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_602d0502ca0a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fcf0bc8399b3.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/life_and_teaching_of_the_masters_of_the_far_east_reddit.pdfIn PDF document text
    • http://mx50off.info/94836036037f68om.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/what_are_the_environmental_indicators.pdfIn PDF document text
    • https://cdn.sqhk.co/pavupaken/LSxe7hi/78543717720.pdfIn PDF document text
    • http://onlineeshop24.xyz/gegajumaxaluzofafedugokukalfvt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392220/normal_5ff1692169790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_6010002c904e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_60279e4154a4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475563/normal_5fdfcda67df65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_601585a19d81a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/zobipifevodilofatuwov.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_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 5100 bytes
SHA-256: 2de25226ad54cc1e57574f641b29b63cba6ee6adcebaf92a18b595c5595a5f89
font_01_sfnt_off0000f124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 10592 bytes
SHA-256: 8615870aa39451c176143de338e931c6209ecf19d84d41f8fb73bf96e4b1720c