Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89b6ae1e907c05f…

MALICIOUS

PDF

103.1 KB Created: 2021-03-19 17:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e084a2c96433f97f3a4d60ac749ab1bd SHA-1: 436eb1c1db6f6b92624b3ef45a574aebb4893b32 SHA-256: e89b6ae1e907c05f214b93a47e2325163cdcf1cbf2abc820359d5f1385947115
186 Risk Score

Malware Insights

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

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 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://kuzutuzo.ru/123?utm_term=cemal+s%25C3%25BCreya+sevda+s%25C3%25B6zleri+pdf+indir PDF link annotation
    • https://cdn.sqhk.co/fofotixoz/Ivhgxgh/kofidamub.pdfIn PDF document text
    • https://dodesurazuxosa.weebly.com/uploads/1/3/4/3/134382101/8d3ec36b5a5b.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/descargar_biblia_reina_valera_1960_para_android_gratis.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/cancer_de_pulmon_tratamiento_nutricional.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/badivipi-rusoninosudum-gojezebuju-rixewi.pdfIn PDF document text
    • https://kikurebimeko.weebly.com/uploads/1/3/0/8/130814200/a89ac9c8215ed.pdfIn PDF document text
    • http://forsage.pw/afc_solar_squad_space_attackql8yg.pdfIn PDF document text
    • https://wuxagukokixeg.weebly.com/uploads/1/3/5/3/135398542/3a6cf7be.pdfIn PDF document text
    • http://vertigoa.online/diwulaxuf2gm1a.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/xevorekovimilurokerop.pdfIn PDF document text
    • https://cdn.sqhk.co/fudimesa/hcghSKO/35083002253.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/gjhJWhh/68818765107.pdfIn PDF document text
    • http://coupons2020.info/22818557461om0g0.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/wufujudisu/xowevofogakefekag.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_22cf9dae4427423c91579bea2785dda0.pdf?index=trueIn PDF document text
    • http://vekisofekibote.myartsonline.com/wojidiv.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_a54a5172e2714e3390cc05b162e0134e.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_e282e6ffa88c4eddb0b856c9d585e6e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/remegesexopupetarasetuve.pdfIn PDF document text
    • https://8d275f60-8e36-4e70-8574-b6d542a617c4.filesusr.com/ugd/dbf6c2_8668fd562afb4b6cb75019865682754d.pdf?index=trueIn 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_off00015275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15275 5564 bytes
SHA-256: fbad8d979c8172efc23e807704f3c2b14acaa751d1ea4af3c6418ccef12e9c86
font_01_sfnt_off000164db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DB 13084 bytes
SHA-256: 8848494bc12b0f246ac9a6955aed708e5b9b141c3f1d8b72d681645d6fd9d43a

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