Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaedae18929277b2…

MALICIOUS

PDF

76.4 KB Created: 2021-03-07 10:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 443184f66164f8a420ddf0cfd6424c84 SHA-1: 1b261ac573b54c6a2863848bb282ccde6ddbbeea SHA-256: aaedae18929277b2e1caa8b10b2c7fc49305e8f105d1cb54cfcdbd1565b95ac7
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external URIs pointing to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure itself is used to host and distribute links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/strik?utm_term=best+graphic+design+portfolio+websites PDF link annotation
    • http://polobasopika.mywebcommunity.org/blue_nile_inc_case_study.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/5beb6d25b98.pdfIn PDF document text
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/bewuj_ledokiji_buzinimobefi_suxitazuwida.pdfIn PDF document text
    • https://velazidolis.weebly.com/uploads/1/3/0/9/130969689/niduviduta_tugejobu.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/are_combination_washer_dryers_good.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/jazavi.pdfIn PDF document text
    • https://xesudubivutomu.weebly.com/uploads/1/3/5/3/135303490/bakopotosubefomiz.pdfIn PDF document text
    • https://nobawevedidilut.weebly.com/uploads/1/3/1/3/131379382/lesapudemitu_jonagegixadige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_600ecb0a85288.pdfIn PDF document text
    • https://nanezafukixepa.weebly.com/uploads/1/3/4/5/134526153/3653423.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/JhhP9ja/mirejudek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459323/normal_5fcb978b8ea53.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/zutoxuguwat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484363/normal_603ab0bc1ee63.pdfIn PDF document text
    • https://buwavazazaradig.weebly.com/uploads/1/3/3/9/133999961/ziniwulinobesoz_lamifatebivov_kivifojumug_tebofex.pdfIn PDF document text
    • https://mufanujirube.weebly.com/uploads/1/3/5/3/135348440/nekogagube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494868/normal_6028e50bbfd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475734/normal_603d6feeae4b3.pdfIn PDF document text
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/zuribexobulatam.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/d7pvBfk/soccer_caps_stars_league_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/pedagogy_of_the_oppressed_book_review.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_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 5700 bytes
SHA-256: 5f6a45dbcb7c653f0a57208518388f49f7972c55795c053b3255de2dd91cd942
font_01_sfnt_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 10308 bytes
SHA-256: 32021c0940c5e6a4cefc4b6b43f630ac08440b673faec0b778bf5a04fffdfb4b