Malicious PDF — malware analysis report

Static analysis result for SHA-256 270d51c85084d774…

MALICIOUS

PDF

81.3 KB Created: 2021-04-15 03:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a858d3f45ecf574274c1ed9ed38609cc SHA-1: 5bc3fada681444e3b01b5fe512c1ba4c312a3fb9 SHA-256: 270d51c85084d7742cae10f21d515f01d6fd5ff7e82b3846e8c89ee802aaa7c5
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 0.9997

Heuristics 5

  • 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 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/strik?utm_term=a+realidade+n%25C3%25A3o+%25C3%25A9+o+que+parece+pdf+download PDF link annotation
    • https://zasawebisev.weebly.com/uploads/1/3/4/8/134865024/boreg-rigurudugamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_6059f375d9ebd.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/7015225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_605f5ae01ef21.pdfIn PDF document text
    • http://pozonewexoz.iblogger.org/7777572321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_604d3f451d422.pdfIn PDF document text
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/jowon.pdfIn PDF document text
    • http://limowoduramu.iblogger.org/go_math_grade_6_book_answer_key.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/betikebumebaxukuveras.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380682/normal_5fcfecfec4a7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_6004e03396369.pdfIn PDF document text
    • http://tadolonelo.sportsontheweb.net/abstract_reasoning_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409093/normal_5fec35a75f84b.pdfIn PDF document text
    • https://pokifuduxorimib.weebly.com/uploads/1/3/4/5/134501468/legixub.pdfIn PDF document text
    • https://kufibewiti.weebly.com/uploads/1/3/1/4/131406300/xorapesig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fe731c7e3528.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/english_ability_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvalinifotu.rf.gd/sapowupo.pdfIn PDF document text
    • http://vijamutekaga.rf.gd/asterisk_tutorial.pdfIn PDF document text
    • http://sipawas.epizy.com/wiwebedokogaz.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/avon_online_brochure_august_2020.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_off0000fa19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 5636 bytes
SHA-256: c3e4b89a3709e648dcde04106aeef40c5e899ef191acb2bc855aa9e21c69cac2
font_01_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 13540 bytes
SHA-256: d2fdb77f5c4e95cdbb58a279c2408de2a035ca2ccd56fd072ff8dc5f4360b027

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