Malicious PDF — malware analysis report

Static analysis result for SHA-256 117d7e7b20684681…

MALICIOUS

PDF

85.5 KB Created: 2021-04-07 02:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7959c6e9d3dc51e8ca10a9d82591c6da SHA-1: 508b4def26f04fb4fe23f8d3355090b2ebca9f24 SHA-256: 117d7e7b20684681940c1bdb730805340b6d36c0573dca34e2bf39cb9a7cea2a
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 0.9997

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://xezojetit.ru/award?keyword=the+library+of+alexandria+pdf PDF link annotation
    • https://bemogipe.weebly.com/uploads/1/3/4/3/134379528/42898895f5bd.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/34650323086.pdfIn PDF document text
    • http://idealsit.fun/download_windows_98_iso_image_file4iugr.pdfIn PDF document text
    • http://fitokapss.xyz/54580934739m70cy.pdfIn PDF document text
    • http://creditscorefix.info/past_tense_in_englishs4u9a.pdfIn PDF document text
    • http://scm03.ru/editable_3_circle_venn_diagram_template4rpvn.pdfIn PDF document text
    • https://jugikezifu.weebly.com/uploads/1/3/4/6/134654678/4b1e8.pdfIn PDF document text
    • https://tefegori.weebly.com/uploads/1/3/1/6/131637168/tivakeki.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/4522031.pdfIn PDF document text
    • http://riwuvodobopexu.mywebcommunity.org/rusox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/refodegenovo.pdfIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_909488ad5c50495c8d1c48a83e2e2400.pdf?index=trueIn PDF document text
    • http://bedopevidorofi.myartsonline.com/luridikefelolozol.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_893bf5c5b000465e98157d0d747809af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/33877383007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1bf176-d45e-47bb-9794-b175014e030c/como_hacer_un_formato_para_mantenimiento_preventivo.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/pexidojajef.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/kodogomaniredif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9b7946-f9a5-431e-9004-616b7090e018/anglo_saxon_burial_mounds.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/limawazisokosasitiduro.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_off00010288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10288 4916 bytes
SHA-256: 8c06feeb7bad5bb96b3a45149e4a1bcdb5d95aa767dad809ae6ab53849945c56
font_01_sfnt_off0001132e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132E 11784 bytes
SHA-256: acfa5fe408e0a2ad39ea226a759a8605d483322f7ca8886781f1f9913e0736bb
font_02_sfnt_off00013ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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