Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2854e6f243dee6…

MALICIOUS

PDF

84.3 KB Created: 2021-03-09 19:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1a2303e9fda5ce9367f653795821a208 SHA-1: 9b0d2adb8bab6ec216e4e7598ad17c76b83b502b SHA-256: eb2854e6f243dee6a5c79207ca744f3e72fcd9cbae64035a9c8647d937ad694d
186 Risk Score

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 0.9994

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://xajibur.ru/aws?utm_term=honda+eu2000i+spark+plug+wrench+size PDF link annotation
    • http://yesnutural.space/zewomivopovujqixx.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/62a476726.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/rifozijunana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_603c28cdb750c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402032/normal_5fe2396e6ddb9.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/4524395.pdfIn PDF document text
    • http://getveran.site/43631067072zdbmb.pdfIn PDF document text
    • https://movadopudi.weebly.com/uploads/1/3/0/9/130969115/5583406.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470967/normal_5fe1c39f19ce4.pdfIn PDF document text
    • http://meetchat.space/lunasanigonekupn7gry.pdfIn PDF document text
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/regasasanebafad_bidowob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fd7cd8ad2a80.pdfIn PDF document text
    • http://copyrightreports.com/indian_history_books_for_iasfree_downloadfc90k.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/b29ef8de-ccee-473d-ae0d-accda8a00305/50461667934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efef3b9e-2fe3-4c2f-a88d-e88340e171e3/visigoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298ec440-19ad-4688-8fa6-270bbb4ea198/japajenofugizagel.pdfIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_82b0723250ec4065a95627db4c5739ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e8b819-7888-44d7-b56e-528b8574815e/siwumunuwumizexazizun.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_96bba9dc57fe42758570a041354c0991.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_0864e996fe5c4d8c9d83a6ba76119dc2.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_22081e0f7ac1442693b6fd317a8d9689.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_0d20a624e07545a7bb45ffb717dcc28c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d449ac9b-2634-46d1-a81f-043242feaa41/most_fearless_person_in_the_world.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_off00010bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFE 5776 bytes
SHA-256: bae4b0252dbee5e6de0a903bb2e8b309205c5505f1e7d32237539247ea65c597
font_01_sfnt_off00011fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBB 10556 bytes
SHA-256: f2cb705015a3cb015f547d17b35f47d096a4327390dc2530b4ce1abf80c936ee