Malicious PDF — malware analysis report

Static analysis result for SHA-256 7baccde53ad074cb…

MALICIOUS

PDF

75.8 KB Created: 2021-03-09 15:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 92126f4d8891094066aa427da5d5e8bc SHA-1: e929275e9fa469e86decad3a1573970df0cf490c SHA-256: 7baccde53ad074cb3d6a80b73e49437018d29ecb945cea4d31c580bf866b7712
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links to external websites, a common tactic for SEO manipulation or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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://golowaki.ru/aws?utm_term=istikhara+dua+for+marriage PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493549/normal_603a87c36f6af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_600c6d8f3e208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_60126115cb65f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476952/normal_5ff4d4cfeca4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_603cacf5998c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd24248d1e0f.pdfIn PDF document text
    • http://zekinaperobivak.22web.org/19173374942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5fdbbc94eb393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_600a494f17f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487897/normal_603138f86615f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447884/normal_5fcdcee41f488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_602d436323da7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_60190d28e6938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_603b7a7e10100.pdfIn PDF document text
    • http://mitutazulew.22web.org/jesamukub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/biology_college_textbook.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_69a697b1b08249aabc6da7a7f9e45b14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuzakob/56908595847.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_445ac81c0b3843b885c0dc9082a65490.pdf?index=trueIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_6f1aac77f1d049589c5d5ea5f72bc38c.pdf?index=trueIn PDF document text
    • http://tejusadesivuti.epizy.com/high_tea_invitation_template_free_word.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_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 5288 bytes
SHA-256: 1f8ad9b551818c554cd5475f6fb8303667d4114e9b550d396f07619685f1d5d2
font_01_sfnt_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 10516 bytes
SHA-256: f57f0102d9e774faa85254d248ab6b87609f7f1b8cbdb6769ca55f13e7e808cc

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