Malicious PDF — malware analysis report

Static analysis result for SHA-256 068813a64a845cf5…

MALICIOUS

PDF

74.5 KB Created: 2021-04-21 14:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8dd45abd18d0ee1f64a4d74f007b0780 SHA-1: 88272c786f8854bbf5a72c6f70fc2f7e3f3dd19d SHA-256: 068813a64a845cf5d2d232e02c00d19cc7779c75e74b4168c74fc34dbf2d7836
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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://zajinet.ru/strik?utm_term=diferencia+entre+planeacion+estrategica+tactica+y+operativa PDF link annotation
    • https://cdn.sqhk.co/zevolazezag/mNVZ4SW/9756242800.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/9jaGjhp/botugibefevilomazosof.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofejujel/hhgjgib/free_business_checkbook_register_template.pdfIn PDF document text
    • http://13millions-warzone.store/342790546411ys0s.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/c1lk9aJ/road_traffic_signs_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/0Rgegho/girefujixaw.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/bUBAghZ/somujevis.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/fjj2iiJ/livestock_judging_practice_class_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tagodepa/iKLdjbT/mizamovitozutu.pdfIn PDF document text
    • http://daating19.site/42726230687jnvij.pdfIn PDF document text
    • https://cdn.sqhk.co/solijisivono/gtSxGji/sipojalorawekawore.pdfIn PDF document text
    • http://aromaita.space/titatuseeu77y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_6826f612b3074b8496e7ac8973224dc5.pdf?index=trueIn PDF document text
    • https://1f9cfe0c-d655-4514-b58a-75380282e405.filesusr.com/ugd/d31784_354465ea9b9244439c86ab08f07fc4b1.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_28d8d6783ce64b5e8188e746ea33c110.pdf?index=trueIn PDF document text
    • http://fojiguxojed.epizy.com/ritowul.pdfIn PDF document text
    • http://wedizakur.epizy.com/bread_recipes_in_tamil.pdfIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_3a2ea5e5812844608c610b2dddd81196.pdf?index=trueIn PDF document text
    • http://buladuwe.rf.gd/gunilevokitim.pdfIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_2bff2cee5ba441fb98c7890859e79492.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_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 5344 bytes
SHA-256: 3b143b820f8046529163022f7e74f5dad5c19389beb5275c9ed6c774dc556abd
font_01_sfnt_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10892 bytes
SHA-256: bb4bdb36b9614d6450d9b8b042be630c6fcbd19a24e85a11c595ad86317e89a4

Open this report in the interactive analyzer, or submit your own file for analysis.