Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c66f18745f9e6c…

MALICIOUS

PDF

76.9 KB Created: 2021-03-11 13:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f48d538f238eb909928e9f69be899aae SHA-1: 20727c2a89ca0ee9c590c816801036197757dad1 SHA-256: e2c66f18745f9e6caf70d026ab0483e797ff05556610033d26408d65df467013
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 0.9993

Heuristics 6

  • 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 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://botokaw.ru/aws?utm_term=kitchenaid+electric+stove+top PDF link annotation
    • http://pedaxofanor.mywebcommunity.org/46608412983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472481/normal_5feb50045d7e9.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/41957303489.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417531/normal_5fcbd6e25d0ef.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/f28f51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5fe3f7c2dbec3.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/domora_buwexude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367674/normal_5feb5ec644441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_602babd736461.pdfIn PDF document text
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/7049136.pdfIn PDF document text
    • https://fezimadi.weebly.com/uploads/1/3/4/4/134487715/lowokebatorelo_rifibufij_tesaxuboxuxapi_velewalo.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/kataxitenejekupokubunavif.pdfIn PDF document text
    • https://jasesinokez.weebly.com/uploads/1/3/1/1/131164090/keruto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb66cd3d-d828-45f6-994f-b5dce3c97535/43763032807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ebc328-1833-4cda-bf4b-6ff3da10f539/zelufeva.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/79300393165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685f9334-13d7-45d9-a0d6-fb5fe0a28d60/5107541367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b6dd1a-031e-41c2-a04a-177693e41c93/new_dance_group_2019_country.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed130bed-aef9-457c-ba08-0cd150400050/kofudali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c213834-84f5-4730-920a-360055238913/samsung_galaxy_s4_mini_gt-i9195_datenblatt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070f74f1-0e24-4a6f-91a9-9e41428d762b/94065627057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a5ebe3-15eb-4a1f-9a1a-26ae2d447534/dell_1907fpvt_monitor.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/hot_springs_grandee_control_panel.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_off0000efac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 5188 bytes
SHA-256: 84bd2860f42bd1b3aa4a6a4f9666faeceb52013b70606eb870c9755a2dbd2cd6
font_01_sfnt_off0001015b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 10848 bytes
SHA-256: 179b3f8aef64bd346e850cb53c4ba6c451fe3d939ad7324237c3515784e55c61