Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddc654befab3605…

MALICIOUS

PDF

75.4 KB Created: 2021-04-24 15:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e8baf7da5bb266f5b07676022166d19 SHA-1: bd279e52f5676ed898b2bf43b421f0c986018572 SHA-256: 0ddc654befab3605abc567030d5ff76ef930586bb5882f00803775e47290e66c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and link farms, strongly suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=natures+purest+bassinet+mattress PDF link annotation
    • https://cdn.sqhk.co/wafavalufa/5ifgdhg/ludo_superstar_cheats.pdfIn PDF document text
    • http://evatopshop.xyz/who_makes_toro_snow_blowersiy7d0.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/94d9f3e5da442.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/fjbgige/zomudugepekezekun.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/ministry_of_health_uganda_clinical_guidelines.pdfIn PDF document text
    • http://premiumpornclips.com/29813029976wwu9a.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/h1jceel/dupafufetokalo.pdfIn PDF document text
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/pumogoxanav_vutiwuzofom.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/ULzQATu/gorupi.pdfIn PDF document text
    • https://vimavopama.weebly.com/uploads/1/3/4/7/134769365/fopamujur-xiguroxuw-nonitado.pdfIn PDF document text
    • http://septiki-rf.website/vampire_the_dark_agesuyhtd.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/naziponuloranomaxox.pdfIn PDF document text
    • http://imkl-checker.com/17296587866rnwgp.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/g8u6hjl/rayman_jungle_run_apk_obb.pdfIn PDF document text
    • http://trend-sales.fun/giwerimefex72.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/2bcb947.pdfIn PDF document text
    • http://bestcreditcheck.info/zuwoxazakevezomo3hzg1.pdfIn PDF document text
    • https://tolutewegudef.weebly.com/uploads/1/3/4/0/134097468/serasotonusu.pdfIn PDF document text
    • https://degemojo.weebly.com/uploads/1/3/1/4/131407655/timonutiv-xiseju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufedowukej.rf.gd/linux_network_administration_commands.pdfIn PDF document text
    • http://bonilevugebenu.epizy.com/5e_druid_shepherd_guide.pdfIn PDF document text
    • http://patazave.epizy.com/ribezuvev.pdfIn PDF document text
    • http://xejojud.epizy.com/wilofaxim.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_off0000e8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 5044 bytes
SHA-256: 8bd897afe0c269c342650ee20041f5c535b2a5635e794a3778a1cd4798df6c54
font_01_sfnt_off0000f9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 11272 bytes
SHA-256: 7841c2146c4bc9260de776427e3ad1da473af8c806b54ee013cc481a57402cc7

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