Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee273b517711f85e…

MALICIOUS

PDF

79.5 KB Created: 2021-05-23 09:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 76d9d0660d03e9ac1422d0caf2c6e0c6 SHA-1: 5f628bca8c7bdfe4564fc301b33adc9eb40f224e SHA-256: ee273b517711f85edf00d7a1e680c9010ad743e1241a012d207d82d1400f27cc
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bafewalu.weebly.com/uploads/1/3/5/3/135350628/bizagemuzametizi.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_6021661812b0a.pdfIn PDF document text
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/6978344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372355/normal_5fe59ece3e861.pdfIn PDF document text
    • https://sibomidejuxeda.weebly.com/uploads/1/3/4/5/134599986/xopedu_dugetu.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/8243d28fcf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5fe9af19381c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404528/normal_5ff4b2eac24ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369150/normal_5fe3ae07ca67a.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/jikafipolipur.pdfIn PDF document text
    • https://lujututuvaribo.weebly.com/uploads/1/3/4/3/134339905/4e440e55.pdfIn PDF document text
    • https://rejupalakutasu.weebly.com/uploads/1/3/7/5/137516983/tutuvoduga.pdfIn PDF document text
    • https://vurerabekude.weebly.com/uploads/1/3/4/4/134493837/a4f381f.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/tumixifisekafan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_606e230b78990.pdfIn PDF document text
    • https://jinobodusere.weebly.com/uploads/1/3/4/7/134722577/wokerewuzesaligonu.pdfIn PDF document text
    • https://ponafet.ru/strik?utm_term=%25D0%25BC%25D0%25B5%25D0%25B6%25D0%25B4%25D1%2583%25D0%25BD%25D0%25B0%25D1%2580%25D0%25BE%25D0%25B4%25D0%25BD%25D1%258B%25D0%25B9+%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B5%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B8%25D1%2587%25D0%25B5%25D1%2581%25D0%25BA%25D0%25B8%25D0%25B9+%25D0%25BA%25D0%25BE%25D0%25BD%25D0%25BA%25D1%2583%25D1%2580%25D1%2581-%25D0%25B8%25D0%25B3%25D1%2580%25D0%25B0+%25D0%25BA%25D0%25B5%25D0%25BD%25D0%25B3%25D1%2583%25D1%2580%25D1%2583+%25D0%25BE%25D1%2582%25D0%25B2%25D0%25B5%25D1%2582%25D1%258B+2020In PDF document text
    • https://ponafet.ru/strik?utm_term=%25D0%25BC%25D0%25B5%25D0%25B6%25D0%25B4%25D1%2583%25D0%25BD%25D0%25B0%25D1%2580%25D0%25BE%25D0%25B4%25D0%25BD%25D1%258B%25D0%25B9+%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B5%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B8%25D1%2587%25D0%25B5%25D1%2581%25D0%25BA%25D0%25B8%25D0%25B9+%25D0%25BA%25D0%25BE%25D0%25BD%25D0%25BA%25D1%2583%25D1%2580%25D1%2581-%25D0%25B8%25D0%25B3%25D1%2580%25D0%25B0+%25D0%25BA%25D0%25B5%25D0%25BD%25D0%25B3%25D1%2583%25D1%2580%25D1%2583+%25D0%25BE%PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4581f0-6798-4902-a0be-d6c83a3367ac/how_to_reset_cisco_access_point_to_factory_default_cli.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/60370187054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d14285-ecaf-47d6-a775-77dfdb9ba955/best_debut_short_stories_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eeba638-4160-4375-8f26-84b5ae655f5d/data_science_course_online_free_with_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/casio_ct-x700_best_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/94031451897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147f2c26-85ae-4dae-b657-da808ba8b5b7/34986528143.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/breitling_aerospace_f75362_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574cd65f-c7cf-459b-a76e-dfa975a60b3b/nurowirosujatav.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_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 6332 bytes
SHA-256: cfb03b1c5d140ea1028f6cb1a02ba499f60c82fbf9314de1af410f57d500a15b
font_01_sfnt_off0000faf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 15680 bytes
SHA-256: 35a2b365400bb7d677cc1c3002539b8181d778c14da6ef1eee39bc9877f36e5e

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