Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcc8478900e68f9…

MALICIOUS

PDF

82.4 KB Created: 2021-03-23 10:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d9bffdc351da331ed492f5f748a6e889 SHA-1: c600e225d856ca83317de2b1797008e6b5a5589a SHA-256: 6bcc8478900e68f9d5fcea0efe7363c33c59884d3354bf95374e224e3e13c586
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 0.9996

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://lozipotod.ru/wix?keyword=ash+is+our+purest+form+song PDF link annotation
    • https://cdn.sqhk.co/semexixok/jg6oGo4/74370998698.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/bobudumuxazaziba.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/Up3jigM/gelivajowimize.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/ijnkQif/suzogodu.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/bhbkGJQ/funny_medical_quiz_questions_and_answers_uk.pdfIn PDF document text
    • http://rimiripa.mypressonline.com/gazixan.pdfIn PDF document text
    • https://cdn.sqhk.co/lawipavoso/NofhhNx/carrera_rc_car_battery_charger.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jefusebu.epizy.com/ha_maine_pyar_kiya_song_free.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_995f3dd610404522912b019839344132.pdf?index=trueIn PDF document text
    • http://didiwufujoloj.rf.gd/simple_comfort_2200_thermostat_wiring_diagram.pdfIn PDF document text
    • http://mapulikilep.epizy.com/isaimini_tamil_movies_2019_a1.pdfIn PDF document text
    • https://cb0508fd-2a1f-4901-a161-a76823ee8e4f.filesusr.com/ugd/52013e_55e5cb0905c844bc9046f17267160792.pdf?index=trueIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_786ea8d4b2d24c34a1cca5efd1e9b1a4.pdf?index=trueIn PDF document text
    • http://jowuwivipi.rf.gd/damazuzujavezizeretese.pdfIn PDF document text
    • http://bedawisanono.epizy.com/kukoteli.pdfIn PDF document text
    • http://jilovin.epizy.com/business_card_fonts_free.pdfIn PDF document text
    • http://nivawuxiki.rf.gd/58907855452.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/82377957898.pdfIn PDF document text
    • http://furoros.epizy.com/jajumovisovizat.pdfIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_eec20738761e4f48bebb782b43cb42da.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 4944 bytes
SHA-256: 66c192732e145c43f618b46b8aab81402bd8ca28c3db41c7485ccdad20f9dfc5
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 11472 bytes
SHA-256: d84cb14366edadf7d77799c3eb6a9dff871c9be63b5e0316f61925570167bf97
font_02_sfnt_off0001135b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 17704 bytes
SHA-256: 7b76c58d2be3db580646c6dc81b8682707252194eeff36458cbd532890037d63
font_03_sfnt_off00012da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333