Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe49d368c646a4c…

MALICIOUS

PDF

78.5 KB Created: 2021-03-09 06:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9993329b7ec06942069b96c3680b7fac SHA-1: 7e171e8882e696bed9c65c943eddb0a92b00ab60 SHA-256: ebe49d368c646a4ca2cd3e941fb0db9e8436b44e66c1b136b4027f4256032ad0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as Pdf.Phishing.Trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary purpose appears to be directing users to external URLs, potentially for malicious content delivery or credential harvesting.

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://nipisod.ru/award?keyword=addition+and+subtraction+worksheets+grade+4+pdf PDF link annotation
    • https://sutivekawexebe.weebly.com/uploads/1/3/1/6/131636655/wuwunugomedatol.pdfIn PDF document text
    • https://cdn.sqhk.co/gipirukanut/iighphh/kunodi.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/eqigIii/101_espn_pick_em_challenge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_601a29fc0779c.pdfIn PDF document text
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/dotizike_vadoka.pdfIn PDF document text
    • https://xowarumi.weebly.com/uploads/1/3/4/5/134519529/xuzaxesubefebud_janaxifuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451754/normal_603f99b49eee4.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/6LkwbC1/sagesanuwe.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/tatojipukaxox-jojezex-kegaguwi-zuganut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5ff1f058143a1.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/gijkThb/train_sim_world_2020_gameplay.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/fupubenipumatemesowi.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/djcytha/sonny_perdue_secretary_of_agriculture.pdfIn PDF document text
    • https://rizegenaw.weebly.com/uploads/1/3/4/1/134108854/xorixulupebob.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/76e516ad-8613-46b9-92a2-793d1ea2ce65/craftsman_mini_tiller_carburetor.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/going_back_to_cali_notorious_big.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c84e61d-0267-47ea-908e-b17435003051/how_often_do_you_do_ddp_yoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b101bb9-22d3-4274-85bf-3e8ff1a6a37b/60919901140.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/simplifying_rational_expressions_worksheets_with_answers.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_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 5756 bytes
SHA-256: 8508c1ac4bfc14de85a7f127a9fb9c63a45b886276ec9e836e3490372ed1fa03
font_01_sfnt_off000108c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C1 10472 bytes
SHA-256: fb448d90606c4759868145a80b6ce7f4430a02ea96113b4addb0af14b941c8c2

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