Malicious PDF — malware analysis report

Static analysis result for SHA-256 046fd208bc12ba05…

MALICIOUS

PDF

72.5 KB Created: 2021-06-06 23:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 564c87cef15f54aa942c10c406cb3e98 SHA-1: 70bbe4e8f5f6e26646c7f46b84a6f678ad039d97 SHA-256: 046fd208bc12ba0546d6eacd4bb76acfe1af3bf39730b88f36ada2fceb9e1521
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 0.9956

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://pistant.ru/pbw?utm_term=3d+crystal+puzzle+daisy+duck+instructions PDF link annotation
    • https://ziwevanefenej.weebly.com/uploads/1/3/4/5/134591483/83583a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369520/normal_5fe026f828082.pdfIn PDF document text
    • https://tejiwubatimi.weebly.com/uploads/1/3/4/8/134899102/9168554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485826/normal_605047e14467c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4393209/normal_60b1aa4772732.pdfIn PDF document text
    • https://zemexiwo.weebly.com/uploads/1/3/4/3/134321437/zesirilufopejal_totofizigerupi.pdfIn PDF document text
    • https://dutizadip.weebly.com/uploads/1/3/4/8/134889078/suwutikexe.pdfIn PDF document text
    • https://vetedikagumon.weebly.com/uploads/1/3/1/4/131453784/b926e79.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/a547a1a3ec582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fc5d26745ffc.pdfIn PDF document text
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/b35c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_6035864f13aca.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/17ddd379-db9e-4f18-a9d8-5cd671289e7e/torozobaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1af281f-ee71-4f3f-b30d-70de881c36ea/oscar_lewis_los_hijos_de_sanchez_resea.pdfIn PDF document text
    • http://garigor.pbworks.com/f/second_conditional_exercises_multiple_choice_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f2c048-021e-4825-9045-c45006ef202e/netgear_wn1000rp_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6740da89-7969-41e0-b1c1-451af75f2203/95240910682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8976348f-9d93-491d-860a-31b7c9b28eff/what_is_a_narrative_essay_in_afrikaans.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144431958/pro_football_game_tonight_on_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1658e3ac-89c9-42ab-be55-fc219d1b22e4/11104781463.pdfIn PDF document text
    • http://tojasakamu.pbworks.com/f/gagijowejifosasov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226a0af9-6b5a-4a52-80ca-1fa5e5ad5105/sudenizifapetatugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e401ab3-18ee-42de-bfbe-2d627dcb487c/what_is_the_meaning_of_digital_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cdd5806-33e4-489c-81fa-6610f531838b/jikikikevuvitixa.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/product_warranty_certificate_sample.pdfIn PDF document text
    • http://pusavivo.pbworks.com/f/32154813247.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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 5352 bytes
SHA-256: 782e9f23b5d0bf99649309e5f6cf1f59e3fabe863939901f9cdb115d2bf53af6
font_01_sfnt_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 9964 bytes
SHA-256: 6071f8c426c25dd5109930665a94e791d156fc6e199b7bcbbe63e7d830b81c1f