Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece1e6cfbbcccb79…

MALICIOUS

PDF

74.8 KB Created: 2021-03-06 08:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d409416355fca725014fde65575fc947 SHA-1: 66cc4dc22a748ca9f570f179d3967314c3d6da49 SHA-256: ece1e6cfbbcccb79812ed495e6b83bfb839ebc3b798c8c01f43ba9d15a7fbfdb
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs and the heuristic findings point towards a phishing or malware distribution campaign disguised as educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://fokemale.ru/wb?keyword=realidades%202%20capitulo%201a-3%20practice%20workbook%20answers PDF link annotation
    • https://jogabaxeke.weebly.com/uploads/1/3/4/7/134704809/fodelajekatebob.pdfIn PDF document text
    • http://sunobalizumona.iblogger.org/oxford_dictionary_full_version.pdfIn PDF document text
    • http://coolvdomaion.online/design_and_analysis_of_algorithms_notesgomqs.pdfIn PDF document text
    • https://witirasa.weebly.com/uploads/1/3/4/5/134525236/wazolopogapijodisa.pdfIn PDF document text
    • http://wubosuvim.22web.org/like_love_enjoy_hate_worksheet.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/faxafixup.pdfIn PDF document text
    • http://topfrag.rip/13704216000s1ccq.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/7766945.pdfIn PDF document text
    • https://pabibajezejav.weebly.com/uploads/1/3/5/3/135323938/tapiwobugijajusu.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/kipijovawo.pdfIn PDF document text
    • http://chtotakoevuxom.biz/how_to_deal_with_power_imbalance_in_conflict_resolutionqhwd7.pdfIn PDF document text
    • http://myfirstsite.xyz/bahubali_full_movie_telugu_mp428tkq.pdfIn PDF document text
    • http://dagulofevururuk.22web.org/jotijusat.pdfIn PDF document text
    • https://raxipufed.weebly.com/uploads/1/3/4/4/134474150/656952.pdfIn PDF document text
    • http://complect-tech.ru/one_minute_sales_person_downloadfkigb.pdfIn PDF document text
    • https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/nonegonumetopegemix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jusisow.rf.gd/mastering_astronomy_assignment_2_answers.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_3b25f9d0479e446fa038e7e34ada73cd.pdf?index=trueIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_ed4f1e92d2eb455a9731f8a0eb2b84ce.pdf?index=trueIn PDF document text
    • http://tetuzufolotozop.epizy.com/veninunekizetosugemalo.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/buffalo_news_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/92543442985.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_off0000e3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C1 5752 bytes
SHA-256: 3a2125797f8b1fa041510709e062adbca4479839534306a08d60363b9a307d41
font_01_sfnt_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 11324 bytes
SHA-256: c04095eb4d38d3a314ad3fdd736df85a31f551d2cc119d93fb16697cb0685dd4

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