Malicious PDF — malware analysis report

Static analysis result for SHA-256 212e9fbdd6104791…

MALICIOUS

PDF

80.9 KB Created: 2021-06-10 13:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 46af31190a6db62757fc680d931a382a SHA-1: 20492a9285135507dcece89ba8ebc0b3868546f8 SHA-256: 212e9fbdd61047913501c190032ad9cf45cfcb9b238c0288dbbbae91de97c578
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/123?utm_term=american+truck+simulator+update+1.+33+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427504/normal_5fc7c668e056f.pdfIn PDF document text
    • https://jizuxiragoleti.weebly.com/uploads/1/3/4/6/134639642/jezenuromel.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/vunadogulogozusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5fe772fece94d.pdfIn PDF document text
    • https://jigulukeduza.weebly.com/uploads/1/3/4/5/134508725/41a493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483833/normal_5fe1616b1e7d4.pdfIn PDF document text
    • https://jekugisolidib.weebly.com/uploads/1/3/4/0/134097103/fibolamogesedoni.pdfIn PDF document text
    • https://zafaketikeduve.weebly.com/uploads/1/3/4/7/134704309/1d0cf4723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_6067760e6e3c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fcc3091ebecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_5fe70a8e2f8ac.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/b480466d-89ca-4900-b410-e7cc4acedb6c/sokejanunaxurudagaluwakog.pdfIn PDF document text
    • http://xifatarege.pbworks.com/f/rasor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75c0838-37ee-4fb0-8a9a-c91dc7936985/juverirotewebexowexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e4672b-014b-4eb0-8a83-908977e11eb5/what_is_inorganic_chemistry_in_simple_words.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144656067/difference_between_sperm_aggregation_and_agglutination.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/ejercicios_de_multiplicacion_de_fracciones_por_un_numero_natural.pdfIn PDF document text
    • http://fubajulak.pbworks.com/w/file/fetch/144712077/change_the_sentence_into_negative_and_interrogative_forms.pdfIn PDF document text
    • http://xizegopago.pbworks.com/f/89348219680.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_off0000fcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 5600 bytes
SHA-256: bd18feca9e1ccfd31440c837b93b4366f470137339df1e04227a7e18ae643ecb
font_01_sfnt_off00010fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC9 10820 bytes
SHA-256: f0787a4a5ba03b3f3c07dc8481cb92841938a820281cf68d7dd51114a2fc337b

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