Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3e14f8c2cd14a6…

MALICIOUS

PDF

96.6 KB Created: 2021-04-19 11:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d3abd8fe6a0fca88c701f72da02a2294 SHA-1: ab98db99871e262aaaf2a795e1ffe2bfadf760be SHA-256: ca3e14f8c2cd14a694ef3310d01346217c8322c28a2f4bdeb043dcb72f9df8eb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, designed to mimic search results for technical documents. The primary URL, https://xajibur.ru/strik?utm_term=introduction+to+electric+circuits+7th+edition+solution+manual+pdf, is likely used for phishing or to redirect to malware. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=introduction+to+electric+circuits+7th+edition+solution+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/ganuniwiku/UgfShdp/minecraft_color_chat_tester.pdfIn PDF document text
    • http://acupofjacob.com/chuyn_t_file_jpg_sang_onlineibq8n.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/cMhb2gi/wozafolu.pdfIn PDF document text
    • https://kenodijegubiv.weebly.com/uploads/1/3/4/5/134501598/baxiwujetekugos.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/xebazorelafew_dutojo_levobewavas_jebuxobak.pdfIn PDF document text
    • https://cdn.sqhk.co/dikabopagesi/jgBhhja/mupipiwefifujexede.pdfIn PDF document text
    • https://winalefumigis.weebly.com/uploads/1/3/1/4/131437210/1354163.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/veseke.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/touch_n_go_ewallet_apk_old_versionv32fy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://parimefi.rf.gd/dmv_audio_handbook_2014_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1886b4-aca1-441b-9d93-9d745b6f31af/does_eat_fit_meal_plan_work.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_d66d9c69c64f4554a553861bc6315d78.pdf?index=trueIn PDF document text
    • http://monuwuwotivonil.epizy.com/68267459602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c77581-22ea-4d17-bba1-3912fc3aa1a5/dofuluwuwutokole.pdfIn PDF document text
    • http://japefafe.epizy.com/gukobawilelifokapikuviza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea3fe28-880e-408d-8f40-aa61346b6b96/samsung_galaxy_grand_prime_pro_specification.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_6539ae4d9da141c1b4b68579a79185ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6211d347-081c-4251-9e39-d572aa391bc4/stihl_gas_trimmer_line_replacement.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_off00013b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6E 5412 bytes
SHA-256: 9134b994c0534cd9f3b686744c4e4dd57db6cb6d70982e8c946e8cc33bdfcb7f
font_01_sfnt_off00014daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAF 11808 bytes
SHA-256: a4efb757153f886f7e68fb239c8bf8ea3f780cf718eace143893fbb3fdd27bc6

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