Malicious PDF — malware analysis report

Static analysis result for SHA-256 84528e4cbd5f56b0…

MALICIOUS

PDF

77.7 KB Created: 2021-03-18 06:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8e50e1a0ab43e19392461273131607e9 SHA-1: c30f1e8ad5c4c7018ebbeb14592db6b5d3b64a61 SHA-256: 84528e4cbd5f56b0d68241ad44038d1ed248d82ec1c11d63193b7d0231bf0f2c
126 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the PDF is part of a link farm designed for SEO manipulation or traffic redirection.

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://mezovuduw.ru/strik?utm_term=the+magic+barrel+symbolism PDF link annotation
    • http://kibesamifi.getenjoyment.net/bundled_conductors.pdfIn PDF document text
    • http://fametasubub.22web.org/cengage_math_calculus.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/livodufevixovufe.pdfIn PDF document text
    • http://xsafak.com/nipipezenuwelapiwnjxi.pdfIn PDF document text
    • http://jatepot.22web.org/mufame.pdfIn PDF document text
    • http://ukrdomonis.xyz/g-shock_rangeman_gw-9400_price2vcem.pdfIn PDF document text
    • http://ligumexijigab.getenjoyment.net/55614909137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gulapore/us_stock_market_today_open_time.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_53eb0a3f3b504cf792e1dca75ce01b0d.pdf?index=trueIn PDF document text
    • http://zapudeni.epizy.com/question_answers_of_the_happy_prince.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/61469052303.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_5d170a6205c241deaac43bbe013d37bf.pdf?index=trueIn PDF document text
    • http://gagelenobom.epizy.com/27849846414.pdfIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_7345b37f7183461c97a41fb4274149ef.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_623fc851f2a143428852c9bb0bed8ae4.pdf?index=trueIn PDF document text
    • http://vobikeretuwof.atwebpages.com/difference_between_associate_system_engineer_and_software_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/jubixirolake.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_8291acf76d7d49ca944932e55b6dc45d.pdf?index=trueIn PDF document text
    • http://minudumira.rf.gd/peabody_s_pipeline_corrosion_and_cathodic_protection.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_44a22c22e51d44249f1d2199b13b9d95.pdf?index=trueIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_bf6f9b2bb30c4dff83e861ed0d719b9d.pdf?index=trueIn 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_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 5404 bytes
SHA-256: a4121e613fbe497bc963c501f84b54e61e1466760eb0fe181a25684b8782d3d9
font_01_sfnt_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 10776 bytes
SHA-256: 548ed162fe73963ddb9eaf6a575f144150fc1e1f3fb769eb9cf352b82f79252c

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