Malicious PDF — malware analysis report

Static analysis result for SHA-256 7293560e807d509b…

MALICIOUS

PDF

76.8 KB Created: 2021-05-30 05:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa87336810729a56c86c08e6e2496c5c SHA-1: 868d54ee3d48e1da4a23c7a7e302783c5a50eecc SHA-256: 7293560e807d509b13340ab9b25d40ca76adaaa912d9a59507f4e60690c77e88
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://jottigo.ru/strik?utm_term=what+does+the+bible+say+about+respecting+leaders PDF link annotation
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/4454653.pdfIn PDF document text
    • https://bikafosujikus.weebly.com/uploads/1/3/2/8/132815014/6914051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_6051287fb1ed1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_6039520f2241d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_60610b98a3e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_605354403588e.pdfIn PDF document text
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/zexeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_600c432e6a319.pdfIn PDF document text
    • https://siluxukazikuwo.weebly.com/uploads/1/3/5/3/135326211/4864094.pdfIn PDF document text
    • https://javewadeje.weebly.com/uploads/1/3/4/8/134882586/96ce12e.pdfIn PDF document text
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/2216783.pdfIn PDF document text
    • https://wurawekizim.weebly.com/uploads/1/3/4/3/134364713/xupivapomojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470692/normal_604e5d0c67846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_5fe65f01aaa90.pdfIn PDF document text
    • https://tilijaxak.weebly.com/uploads/1/3/1/3/131381787/5207202.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/2797150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502439/normal_601703a14ff80.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/jolodigonojixolu.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/1cff65f5-ec0d-4bd8-9dae-89e5b609397c/kujajubopabasogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1ee5e4-0efc-4079-8aab-587b0f175bdf/xefanojejusosukid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae95a758-4969-4b3b-b0f4-4dfbb510001e/72669431494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48a8fa7-cb60-4e9a-80ff-69c06e14ae29/int_sin2x_cos3x_x_is_equal_to-.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_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5588 bytes
SHA-256: 7f4deea410f89a903388b310791c05743952d8555099aa9698222f05bbb9553f
font_01_sfnt_off00010108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10108 10736 bytes
SHA-256: 4adf84280b1352a98be0c017d8ffd70152ac53f380809655a05b6bca6dec21d1

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