Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c65e543d4f1cafc…

MALICIOUS

PDF

74.0 KB Created: 2021-06-01 12:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 228ff59033cb5bb7425cb1ca2b180997 SHA-1: 4d7e80900831006d4a27595657ed639d223ff0e7 SHA-256: 0c65e543d4f1cafcc4a0d8ee729372653ecde001e8d10a1642ab0d6da00b11e3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm and detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The PDF structure and embedded links are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kenomixu.weebly.com/uploads/1/3/0/9/130969587/lelozi.pdf In PDF document text
    • https://sirefofaf.weebly.com/uploads/1/3/4/5/134523631/2be8a90.pdfIn PDF document text
    • https://babivefe.weebly.com/uploads/1/3/5/3/135312435/zokufivawilogod-puwumelexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_600d1288433d2.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/ce253.pdfIn PDF document text
    • https://fekanefitogi.weebly.com/uploads/1/3/4/3/134340372/01791b19ce.pdfIn PDF document text
    • https://fewabobur.weebly.com/uploads/1/3/4/7/134713859/doxapuzowovox-gavak-kanuma.pdfIn PDF document text
    • https://fobijolosa.weebly.com/uploads/1/3/4/7/134730704/6c3c9382ee0.pdfIn PDF document text
    • https://togasiwivote.weebly.com/uploads/1/3/4/3/134370981/a989449322.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/5723576.pdfIn PDF document text
    • https://fekanefitogi.weebly.com/uploads/1/3/4/3/134340372/8b136d0dd604fad.pdfIn PDF document text
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/budiji.pdfIn PDF document text
    • https://gexokatex.weebly.com/uploads/1/3/5/9/135960098/3225926.pdfIn PDF document text
    • https://kenoduzuran.weebly.com/uploads/1/3/5/3/135350653/gikanowe.pdfIn PDF document text
    • https://jimitorivav.weebly.com/uploads/1/3/4/8/134878901/maderetepakupadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_6030d496c0262.pdfIn PDF document text
    • https://allytemp.ru/pbw?utm_term=%25D0%25B3%25D0%25B4%25D0%25B7+%25D0%25BF%25D0%25BE+%25D0%25B1%25D0%25B8%25D0%25BE%25D0%25BB%25D0%25BE%25D0%25B3%25D0%25B8%25D0%25B8+11+%25D0%25BA%25D0%25BB%25D0%25B0%25D1%2581%25D1%2581+%25D1%2580%25D0%25B0%25D0%25B1%25D0%25BE%25D1%2587%25D0%25B0%25D1%258F+%25D1%2582%25D0%25B5%25D1%2582%25D1%2580%25D0%25B0%25D0%25B4%25D1%258C+%25D0%25BF%25D0%25B0%25D1%2581%25D0%25B5%25D1%2587%25D0%25BD%25D0%25B8%25D0%25BA+%25D1%2588%25D0%25B2%25D0%25B5%25D1%2586%25D0%25BE%25D0%25B2In PDF document text
    • https://allytemp.ru/pbw?utm_term=%25D0%25B3%25D0%25B4%25D0%25B7+%25D0%25BF%25D0%25BE+%25D0%25B1%25D0%25B8%25D0%25BE%25D0%25BB%25D0%25BE%25D0%25B3%25D0%25B8%25D0%25B8+11+%25D0%25BA%25D0%25BB%25D0%25B0%25D1%2581%25D1%2581+%25D1%2580%25D0%25B0%25D0%25B1%25D0%25BE%25D1%2587%25D0%25B0%25D1%258F+%25D1%2582%25D0%25B5%25D1%2582%25D1%2580%25D0%25B0%25D0%25B4%25D1%258C+%25D0%25BF%25D0%25B0%25D1%2581%25D0%25B5%25D1%2587%25D0%25BD%25D0%25B8%25D0%25BA+%25D1%2588%25D0%25B2%25D0%25B5%25D1%2586%25D0%25BE%25D0%2PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29200b19-69ed-4906-bb8a-ebf4435934f8/historia_de_mexico_resumen_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa78af0a-1997-43cb-b726-1fb272494ca0/kymco_agility_200i_max_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307df26c-1329-4f43-92c9-0b29655c4c4e/29468215408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee9b962-c17d-444e-9ef3-35a074aff06b/pewufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2403a35f-b335-4fb8-9952-768d44ff3945/city_of_glass_chapter_6_summary.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_off0000d47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47E 6232 bytes
SHA-256: 5d87ab05cb3529961d0750f2b1bef4c4938b058dee2fdf9227d626e2cacb5eca
font_01_sfnt_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 14392 bytes
SHA-256: 08a7caf861b3ef0b73baba62e34e0dd030d6b9cfdda8496e767c4333d175b618

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