Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0aee6563b1c62b…

MALICIOUS

PDF

77.0 KB Created: 2021-06-05 17:39:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eebee71025215ca9ea7b83c580b5a9db SHA-1: 9a99e6ddbf63d495b1f92ddcf67c8550f05b37d9 SHA-256: ed0aee6563b1c62b93fd0f902085567cad5e37d6bb45f06be5c9bde1f2aaeced
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 0.9998

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://irlanc.ru/pbw?utm_term=rc+jet+engine+kit+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496146/normal_602755900eb82.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369336/normal_60b38f01f0aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_6064296d38880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fd3aedb3ba01.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
    • http://ziduzobif.pbworks.com/w/file/fetch/144620838/gizerizirumerosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43dff5c3-0a82-4f44-ba13-6fc494759dfe/can_you_wear_the_fitbit_charge_3_swimming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c40849-6fb1-4df6-8553-e88fad9d096d/remington_700_short_action_lightweight_stock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420d1c75-45db-4650-89a5-73282893984d/50824528406.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144445074/35083726230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8091a628-88d6-4eb7-b312-c602e1d746ee/elgato_hd60_pro_setup_dual_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a18419d-4df9-430e-a674-f8a0b4aa91f3/7078067046.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/f/antemortem_vs_postmortem_bruise.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/f/lasopafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cd712e-8efe-4b8f-9dc9-0a9ee4a3c11d/ssis_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc705da5-8460-4ee9-a318-020f0b36d5eb/gufeluzek.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/35884649764.pdfIn PDF document text
    • http://votekotokuz.pbworks.com/f/acfe_sa_membership_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92080a5e-a583-4de4-96af-c0949a30e46e/48549377690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad4ea62-ae26-4ec3-9420-0641def9f3fe/difference_between_empathy_and_sympathy.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_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 4984 bytes
SHA-256: cd88a1d2736ebebf71a8f925eb94424003ba1c9052fe00f1068469f2d5eb9508
font_01_sfnt_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 10668 bytes
SHA-256: 8e4665d9743167409783114999c62dae51807b0b5d4dd9b556c2cf149cf5c462
font_02_sfnt_off00011884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11884 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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