Malicious PDF — malware analysis report

Static analysis result for SHA-256 697735844d779b11…

MALICIOUS

PDF

75.6 KB Created: 2021-04-04 13:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f57955d29163926bc23fdc14d923784 SHA-1: b21d21f47d131e80c3aca9d9060751b7e99af7c0 SHA-256: 697735844d779b116b67ff62365230ff160d0a5b1ceb8c91d2d64fee32449b17
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 0.9991

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://dugedepap.ru/wix?keyword=the+case+of+the+deadly+verdict+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446035/normal_6019912907289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_6037f7e017253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_5fdafdf4715a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5ff92ddfebee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_6052f04b3dc8c.pdfIn PDF document text
    • https://xamukujivova.weebly.com/uploads/1/3/1/3/131384573/9964076.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/2702523.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/bncc_ingles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490132/normal_6041dd589131a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411501/normal_5fccc3ba91093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_6015e7f889753.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/analytical_skills_mcqs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388612/normal_5fc89f8129dee.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/wukuxilom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470683/normal_6003ba9a6161e.pdfIn PDF document text
    • https://wipiwabe.weebly.com/uploads/1/3/4/4/134438476/960629.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/breviario_di_estetica.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/setufutaxepalo.pdfIn PDF document text
    • http://gomijexa.mywebcommunity.org/zibobukevonib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_142ce89f02a74be7847bf26b4cb509cb.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_fbcd801f22e146789ee15522e2dd6812.pdf?index=trueIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_892aa0d31415487d89e9e2d43eb741a9.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_090dc3c91b7e4c46931f608a404b0bc2.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/xinufafisepiga.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_off0000e9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 5360 bytes
SHA-256: 390d1cbc3df0709a4ab0e010d09b97f7798cf1c0f37af80c84d3a4e5348239c0
font_01_sfnt_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 10616 bytes
SHA-256: e04ef688824bf9712c9aa031cef20ec607cc1c828e8d9e6edca60f5647d79d0d