Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c1cc3df7f048e0…

MALICIOUS

PDF

72.6 KB Created: 2021-02-26 03:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3cfeb671cd8e911ebe1360378bf671d4 SHA-1: 5eb85c2cd6983b213a27af7fff9b9199a122086f SHA-256: 26c1cc3df7f048e06484c69d07d1dd05698108ed6094c2d26b57383b0d1f825c
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The presence of UTM parameters in some URLs further supports the idea of tracking user interactions for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=fisher+price+toy+story+carnival PDF link annotation
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/zovusufol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_6023dd6f829f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470014/normal_5fc9cfa36ebbb.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/lord_of_the_flies_study_guide_chapter_5-6.pdfIn PDF document text
    • http://burrrhey.tech/32637215155rmrg9.pdfIn PDF document text
    • https://munelexogetajax.weebly.com/uploads/1/3/1/4/131437313/kesobizebukos-ganokidozotare-xesefilur.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/5598196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_6016ffbc444c8.pdfIn PDF document text
    • http://artyom.guru/paleontology_lecture_notesuh5uq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_6020d3a6ae9c0.pdfIn PDF document text
    • http://itash.space/bsc4success_monthly_mcqknxtm.pdfIn PDF document text
    • http://legalvictory.group/52502500192mqez3.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/donuzutagox.pdfIn PDF document text
    • http://legiontry.online/14267321524ito7s.pdfIn PDF document text
    • https://vikenefimedok.weebly.com/uploads/1/3/4/3/134390201/xinipizuwoz.pdfIn PDF document text
    • https://wobelafesuta.weebly.com/uploads/1/3/4/7/134767333/5e0421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligoroxenafof.atwebpages.com/xesafesewatejekerulisuk.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/87297051200.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_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 5136 bytes
SHA-256: 0cd5029e2894e878ac75452aa80fb80bdf9401e24e459b8ae98a27755b800e04
font_01_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 11744 bytes
SHA-256: cd4cd5a4ad437cee19e82084611119c1204d48305531ae45a637d5d731747c68

Open this report in the interactive analyzer, or submit your own file for analysis.