Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6e9dd82e0e4399…

MALICIOUS

PDF

75.4 KB Created: 2021-03-10 03:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 06253bcf0005ffdad771c401e371e07f SHA-1: 93f0da65628cbd31799646f965324bc86fec60dd SHA-256: fc6e9dd82e0e43990d9089ce1a60fe2a36470396ad533da3683b14e492e50d67
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://xezojetit.ru/award?keyword=college+mathematics+barnett+pdf PDF link annotation
    • https://lerozezowigex.weebly.com/uploads/1/3/0/7/130776164/nojomuwiwarajatame.pdfIn PDF document text
    • https://fimibiwuru.weebly.com/uploads/1/3/2/6/132696060/vuxogodolopamozawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_6019120e84cc8.pdfIn PDF document text
    • https://bukodagunotul.weebly.com/uploads/1/3/4/0/134012399/luvoje.pdfIn PDF document text
    • https://zomogazafef.weebly.com/uploads/1/3/5/3/135348967/23a8f7fa23f22.pdfIn PDF document text
    • https://zoponexe.weebly.com/uploads/1/3/1/6/131606878/jafugosoma.pdfIn PDF document text
    • http://iqecoportal.ru/olympian_generator_parts_manual19bmf.pdfIn PDF document text
    • https://tisolalaw.weebly.com/uploads/1/3/0/8/130814234/3149381.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/43470109253k0wmu.pdfIn PDF document text
    • https://kisujaxu.weebly.com/uploads/1/3/0/7/130775962/9271437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_602967c60d5d8.pdfIn PDF document text
    • https://nosilagime.weebly.com/uploads/1/3/4/6/134613039/6342254.pdfIn PDF document text
    • http://hotsales-com.xyz/how_are_the_pll_books_different_from_the_shows6l5b.pdfIn PDF document text
    • https://xiridibokolu.weebly.com/uploads/1/3/1/3/131379099/08e84a8bfea179a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_60471764a7081.pdfIn PDF document text
    • https://ravijirigiraga.weebly.com/uploads/1/3/4/6/134649302/nibagukazekozab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420775/normal_5fe0a3c398b9b.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/xumakomowi/56086117542.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/breakup_party_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 3256 bytes
SHA-256: 80162944d42f01944a78218aee31360e0e5f4b674ec408d4d536194a1f116934
font_01_sfnt_off0000e9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F0 5612 bytes
SHA-256: ef012acbc776188c660140b982fb7743814fa1463e48cd0952a4f2653aa165e1
font_02_sfnt_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 10364 bytes
SHA-256: 911a727ad19c83dbe2be4a70f7f48768ecd1c08e8b0e1c8bb56a1d87a65d94a0

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