Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba76f308c769f8d…

MALICIOUS

PDF

114.4 KB Created: 2021-03-05 22:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 84b0546307839ad43c4d2a178765e46c SHA-1: 32f9c4d3551ebfe2bfeb95cef2900ceed809a4c6 SHA-256: 4ba76f308c769f8d09598a4f3c3d33b6e0f7a64aef254a3093002fb58d4c7479
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://golowaki.ru/wix?keyword=demon+hunter+leveling+guide+season+20 PDF link annotation
    • http://betizekaxu.getenjoyment.net/wutuxuxevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepupenaj.rf.gd/adb_connect_android_tv.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_c2d7c0942e5f4ddeb88e3e217f1fec77.pdf?index=trueIn PDF document text
    • http://nabenejajoko.myartsonline.com/propiedades_fisicas_y_mecanicas_de_los_materiales_metalicos.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_1dc9312587be46559b6433d8d230cbde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/81804235166.pdfIn PDF document text
    • http://terajupatasan.rf.gd/ma_pass_movie_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a9d6af-e037-4cf5-a7ac-0ecf0e79d8bc/2010_chrysler_town_and_country_touring_recalls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfc3f48-8868-486c-a9e0-904144b94c1b/how_to_put_shredder_on_cuisinart_food_processor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90940015-bdd1-4c80-98e5-8c767dc012fe/8705651716.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/azure_application_gateway_certificate_arm_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c43c13-d1c1-4566-bb20-88b2791a5a6a/36978332776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c9a117-acfc-4e1d-8a06-453006c0d134/pitejonipatixek.pdfIn PDF document text
    • http://puredaw.rf.gd/97097932090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3609eb74-fc0e-43de-82ae-2a77ea1c27d3/vimazedavu.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/odia_song_video_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f9a917-2d60-4e65-88e5-526f2d3343e2/el_principito_libro_completo_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efb98e6-c2e0-4763-a3da-3390684ed353/dojibebarawaduz.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_d5e71e5db8a643a2a270aab4974cf3c6.pdf?index=trueIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_89c3553c73f1478991a86a231d8e711a.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_off00018456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18456 5572 bytes
SHA-256: b5e99808c38369ebb4853ba88b877c339dc7879fe89de7c62629a0e369f2e45c
font_01_sfnt_off0001972a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1972A 10640 bytes
SHA-256: 0124a30133b5374667440739e30a2ec78d7382720e1204bb6c9fcb4816f733a1

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