Malicious PDF — malware analysis report

Static analysis result for SHA-256 a782ccfe5893357d…

MALICIOUS

PDF

96.4 KB Created: 2021-03-28 01:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9402cc33b890f3104d839dc2ecde5bcf SHA-1: 257981328390ad385d87325a4f63d2e94ecdcb9e SHA-256: a782ccfe5893357d37499103d012d7a6ba55653715919fc6e94aae3b16e8f491
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to potentially malicious or SEO-manipulated content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to redirect users to malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • 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=what+gpa+is+needed+for+cu+boulder PDF link annotation
    • http://vemasujananexu.22web.org/1766777057.pdfIn PDF document text
    • https://zibezalobe.weebly.com/uploads/1/3/4/5/134529300/wugamerepoderibil.pdfIn PDF document text
    • http://bedojipekasel.22web.org/approaches_and_methods_in_language_teaching_download.pdfIn PDF document text
    • https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/lofaxasovejalof.pdfIn PDF document text
    • http://somukegizos.66ghz.com/44637684278.pdfIn PDF document text
    • https://gikudinok.weebly.com/uploads/1/3/4/7/134730402/sekimi.pdfIn PDF document text
    • https://gegovowazuravas.weebly.com/uploads/1/3/1/3/131398401/nutepevufatoluz_xusuji.pdfIn PDF document text
    • http://xemepuvaxeliv.iblogger.org/77737841439.pdfIn PDF document text
    • http://dupezivekiguje.22web.org/dagevexilufike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nifiloxoburufi.rf.gd/2737918035.pdfIn PDF document text
    • http://pututut.rf.gd/thomas_merton_book_of_hours.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_88d078449fbf4e99818f7a3b73da2dbb.pdf?index=trueIn PDF document text
    • http://rosuwofa.rf.gd/7491917184.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/lufakugasofe.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/manual_blood_pressure_cuff_with_attached_stethoscope.pdfIn PDF document text
    • http://relamelekubapan.epizy.com/futumagunupuwawufuje.pdfIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_e70aabbbb58948edb44f4c96a1ee0f47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/frigidaire_stackable_washer_and_dryer_manual.pdfIn PDF document text
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_5c77810877864600b5fd3daa373c9bc0.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_395d22731b7a4dc5a74382279dc6369b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novifamigot/jewuse.pdfIn PDF document text
    • http://zefobik.epizy.com/71413207153.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/ravis.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/amazon_prime_device_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/gimutadisodomuwowagazoruj.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/80593338381.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/adobe_acrobat_reader_apk_old_version.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_off0001389c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389C 5568 bytes
SHA-256: b9a86e7ea34203378ab39eefe0fc2e809ba3668e8bb42e5f9ec654e02b2c6a52
font_01_sfnt_off00014b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B92 11764 bytes
SHA-256: a40a3abb58aed8388e2d0ef88ab1b6c26f4b9148fb8c7cf9222ad9ec8fe5a078

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