Malicious PDF — malware analysis report

Static analysis result for SHA-256 5076c95f85da0206…

MALICIOUS

PDF

82.4 KB Created: 2021-06-01 05:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: abd29917abbb339d489c7c0bbfa5f2c7 SHA-1: 0ed2e0020a66b9cf705c9dff2680955435174f5f SHA-256: 5076c95f85da0206e1f36d6b93a365be10f6a0fefde76b27f13461751a3a019a
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 0.9950

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://queure.ru/pbw?utm_term=what+pods+are+compatible+with+nespresso+vertuo+next PDF link annotation
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/6a5b9ac433c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5fd2625017504.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/3083158.pdfIn PDF document text
    • https://gedotelebuguda.weebly.com/uploads/1/3/6/0/136050260/9075990.pdfIn PDF document text
    • https://fiverepibimasi.weebly.com/uploads/1/3/4/8/134893498/e1166077.pdfIn PDF document text
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/bf4569ca7a4ec.pdfIn PDF document text
    • https://tavekudu.weebly.com/uploads/1/3/4/6/134631894/rumid-sepovopeguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_602034f5299b5.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/77ba4701.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/4466108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_603b30aa09175.pdfIn PDF document text
    • https://rutujuxifir.weebly.com/uploads/1/3/4/6/134632780/bomodedesusade.pdfIn PDF document text
    • https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/dc642fcf5542a0e.pdfIn PDF document text
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/9796309.pdfIn PDF document text
    • https://zefimaral.weebly.com/uploads/1/3/0/7/130776827/ceddcfcdb94.pdfIn PDF document text
    • https://gosovusini.weebly.com/uploads/1/3/2/6/132696158/87a0757015.pdfIn PDF document text
    • https://matupazuru.weebly.com/uploads/1/3/2/6/132681479/luzoz.pdfIn PDF document text
    • https://rejigebejone.weebly.com/uploads/1/3/4/4/134462336/1289329.pdfIn PDF document text
    • https://melokiziw.weebly.com/uploads/1/3/4/6/134669089/66e0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_5fc5ed8d7d2ca.pdfIn PDF document text
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/zawefuxo.pdfIn PDF document text
    • https://bepogopinaw.weebly.com/uploads/1/3/4/7/134742936/2004304.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/sejosajasenuk-tumog-jikeduluxop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b9f9567b-698f-46a4-b21a-12dab36598c5/wunizugimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4206d844-d4ed-411b-bbdc-15a0d3569125/45082089530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5ebcb2-8f9c-4c82-84d1-16943bfca6d4/how_do_i_sign_in_adobe_acrobat_pro_dc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9e78a9-dbbb-4b09-b42b-f5699c984da1/pioneer_vsx_1020_receiver_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 5568 bytes
SHA-256: d5ce1160b366932381f6b2db704c92249b6f8eb1a6590c10a7e2bc02b4ba2d98
font_01_sfnt_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 10404 bytes
SHA-256: 619cda516baec64f9f8efce3229e89b72cce81407e78ac0cb9da9a7b3c41ed60
font_02_sfnt_off00012bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3