Malicious PDF — malware analysis report

Static analysis result for SHA-256 62360f3c658a7058…

MALICIOUS

PDF

79.2 KB Created: 2021-03-19 23:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 03fb6b51c901a67582bee0b5d36506ca SHA-1: 27267ee6829671d6d6844e1705b8e182fb810689 SHA-256: 62360f3c658a7058f39c649a54ae89a4955ae12845fadcff809f46eb24b785f3
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, with a primary suspicious URL being https://dugedepap.ru/strik. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on disposable domains, further supporting a malicious intent. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=new+star+trek+novels+2019 PDF link annotation
    • https://wivewuti.weebly.com/uploads/1/3/4/6/134698804/1bf4fce6.pdfIn PDF document text
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/fudojivuse-xaxevudi-feliti-ruxeniwutugo.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/38394242408.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/1hjvtqf/avenger_legends_guide.pdfIn PDF document text
    • http://vajesafosedepur.mywebcommunity.org/computer_networking_related_course_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/agghaKH/16184298280.pdfIn PDF document text
    • https://rujizubag.weebly.com/uploads/1/3/0/7/130776042/purubowelun.pdfIn PDF document text
    • https://cdn.sqhk.co/besiwowegin/ZjbPHid/pebiwoxokajumalu.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/zggLgHQ/bowling_alley_kingston_pike.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/mozidumalul-sowazizez.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/9cb758105cb6.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/pidotos-kakube-femogijude-pibaxag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/jujuwatewonulisibedex.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/mosilaxukepatof.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/educake_answers_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/jimoled.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/83647641681.pdfIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/how_to_install_janome_free_motion_quilting_foot.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/camera_obscura_history.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 5344 bytes
SHA-256: 3513d2ee660845d998fdecba8449ffb9cb015a90a1fdd738a52281dcdb9859a3
font_01_sfnt_off00010925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10925 11476 bytes
SHA-256: fd26c2ad1b388494d1842674ff9855e0b652d66b466aaa7cd55574695e8e022e

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