Malicious PDF — malware analysis report

Static analysis result for SHA-256 66dda2a21fc61b70…

MALICIOUS

PDF

80.8 KB Created: 2021-03-19 23:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 03b056d8d43fa13e201ebdf991a6b225 SHA-1: 581acd472c9ee5105ce2ad5140475058036cf56b SHA-256: 66dda2a21fc61b70a757c1a7a8f9a1ee93daec6528520bad71f46257bd87ff96
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and Weebly subdomains, indicative of a link farm or phishing operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high ML score strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to 'resistance bands' and 'bodybuilding', likely serving as a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://jacksth.ru/strik?utm_term=best+resistance+bands+for+bodybuilding+uk PDF link annotation
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/jovirabeb-firise.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/magaketoj-domek-jaduxatuxiregi-gamujikatenol.pdfIn PDF document text
    • https://zomatofaso.weebly.com/uploads/1/3/4/6/134633851/zizirumiwo_sofiposode_davin_bikinukelogo.pdfIn PDF document text
    • https://fibobamoga.weebly.com/uploads/1/3/1/6/131607866/kewukoxuzudi_vapepopuma_xajibadidereraj_fijalamopupo.pdfIn PDF document text
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/noreji.pdfIn PDF document text
    • http://nevodoma.iblogger.org/beeswax_sheets_for_candle_making_australia.pdfIn PDF document text
    • http://dabejorugorazom.22web.org/11398190519.pdfIn PDF document text
    • http://dusosax.66ghz.com/salotasijuwuzu.pdfIn PDF document text
    • https://vudexugir.weebly.com/uploads/1/3/2/7/132710723/mowelorupineju.pdfIn PDF document text
    • https://vagoledos.weebly.com/uploads/1/3/5/3/135320004/6259251.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/f737359fc.pdfIn PDF document text
    • https://dusitibepilezu.weebly.com/uploads/1/3/1/4/131437978/703b1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9312fb-9780-4b10-bc0a-9465b3a9e4ab/fapure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6d8849-b09d-48de-96ba-ddbf603e85e8/vajigawajidivizuvuxexesot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a98f1f-1b1c-443f-9ac2-c89b991e9968/what_is_meant_literature_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a216b556-58ae-4e19-8566-832435c4632a/how_big_is_32_mb.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/rotosumobatezijukew.pdfIn PDF document text
    • http://paluluw.epizy.com/non_behavioural_objectives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70141112-baad-43a6-94c8-b17b2f3ca6e4/90170975817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac66d68-fd6e-46e5-9ff5-ea85fac9be63/casio_solar_watch_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50daa9d7-def0-485b-af9f-743109a0db1e/sherman_alexie_superman_and_me_genre.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/safivefokiwunigijiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/34334963910.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_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 5544 bytes
SHA-256: ffad5204b12fad48e4ca72059e632c1f77024de55b44acd10e1ed85349c35aed
font_01_sfnt_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 11300 bytes
SHA-256: 8b2900660387f99b28c83fcfd333e11ee6ade38d156784ce8159c3c909f58dbf