Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb643ccf8de4b08…

MALICIOUS

PDF

84.8 KB Created: 2021-03-10 11:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 647da6886fcc52339eb56d9b6723ecb6 SHA-1: f0bc7fb9aa105a7de5ae84f06e73ea17901a50a0 SHA-256: beb643ccf8de4b0834b18a6c181d56a4e989c18f8f796039995ea8d22168166f
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to "Hilaire Belloc Cautionary Tales PDF". No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/123?utm_term=hilaire+belloc+cautionary+tales+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416660/normal_5fdcb5f843525.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/hhjnoFf/22052917493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5fdb0d9675ba1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_6009447b1f13f.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/ebweS7n/42074377007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481056/normal_601b47768e2c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387226/normal_5ff7ac731b3a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461763/normal_603f4edfc6638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443341/normal_6018af3807d81.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/jfchahd/christian_movies_on_hulu_right_now.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/FhjFgiB/baxagopave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375515/normal_5fd065f4b88db.pdfIn PDF document text
    • https://cdn.sqhk.co/motuxeneb/drhiOjh/crackle_nail_polish_set.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/jeEhjij/10549910200.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/fhibtiT/baixar_antivirus_gratis_para_celular_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416787/normal_5ff697cbc9ac2.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/i9ifiif/non_travel_bucket_list_ideas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_5fcb50043870d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_8023052f58e64d62ac116046ad0287ef.pdf?index=trueIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_83075abfb591405fb85ab4f1e5946541.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_a4378b696c4944938a1f4b42ba20b38b.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_404d7381df01492e81c98ab1241c43bd.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_af005073090849f187cc6e384d563296.pdf?index=trueIn 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_off00010ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF1 5352 bytes
SHA-256: 2f2fb79560bde5e1391cfe74d469adefc2d3850679e47e5338462a415fd53d39
font_01_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 10612 bytes
SHA-256: 12a89f37b50efd545639a28537a8a43d989040bd65487b89528b9117f925d0f0