Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e80285b5ccfaa76…

MALICIOUS

PDF

83.4 KB Created: 2021-03-28 10:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 21764044b68b4469e39f832360b134dd SHA-1: 1d8830a1dd21dbd58707f06c38d8a3488d55ec0c SHA-256: 7e80285b5ccfaa768faadbdfb8c50795075d093e8342ff718841a6293b2d5ea0
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 0.9997

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/strik?utm_term=scientology+a+history+of+man PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387054/normal_6051ca1362785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_5fd76b42d14fb.pdfIn PDF document text
    • http://ritixabig.iblogger.org/9408941883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_60334aa24379e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_b9bc57e50d4c44cc874ac9ae6dac471b.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_acce9b0a51584365b5402a9b673852af.pdf?index=trueIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_5a1c98ac3e724879a95a092080a1e58c.pdf?index=trueIn PDF document text
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_3c33f5954ddb48b094b844ecd275357f.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_8ccfe957c6a54657921c7420344b1cc7.pdf?index=trueIn PDF document text
    • http://limixumijegaf.epizy.com/91097813283.pdfIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_83fd6e18d2f44217a9663b1432eadf00.pdf?index=trueIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_7fa2a4883b954c2c879655e3c8015cd5.pdf?index=trueIn PDF document text
    • http://gimobomir.epizy.com/bodyboss_method_gratuit.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_f30011ed879d4aeabdaa33d38cecfc8d.pdf?index=trueIn PDF document text
    • http://datonojafasaxup.rf.gd/65939288638.pdfIn PDF document text
    • http://gagoxapedako.epizy.com/fotuzaxibeliwepiwoxoj.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_8366097d1674436ba668a1bc91f7d6ae.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_e042e7175c604b5999604aaf7e901cae.pdf?index=trueIn PDF document text
    • http://xezujuwevan.epizy.com/beauty_and_the_beast_serie_tv.pdfIn PDF document text
    • http://mokupimi.epizy.com/kunodikemupuwefeboronike.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_5d8355ae235b4f21a1adccf1a2ce3c32.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_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 5500 bytes
SHA-256: 0009ea5650bd3126c76dffed2fbf9958003bd8ac62247deeadda356134d76f71
font_01_sfnt_off00011c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C52 10496 bytes
SHA-256: 7211aee6ebc4763cba7a7878c2ab35b670191252b29258753fd1b20dc54be0b1