Malicious PDF — malware analysis report

Static analysis result for SHA-256 94681c41d3b19fe4…

MALICIOUS

PDF

94.3 KB Created: 2021-06-01 17:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 23107c4dbec9a87b585bc5a6d9336490 SHA-1: 7afbd5631ea83030cec37ade3a8b3ecac7843dcc SHA-256: 94681c41d3b19fe4245f7ebe91a6a3eb38da50427f93da74729c089758d0860f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many of which are on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://drafthe.ru/pbw?utm_term=wing+chun+pole+form+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://drafthe.ru/pbw?utm_term=wing+chun+pole+form+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413590/normal_5ff8d7b92270f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383573/normal_60008911bfaca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5fd7d6a817faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_606b1d990e078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_6024c87b3d1d1.pdfIn PDF document text
    • https://dadizatutelebi.weebly.com/uploads/1/3/1/0/131070904/d4588.pdfIn PDF document text
    • https://gomigara.weebly.com/uploads/1/3/4/7/134727279/6f7ec6017.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
    • https://uploads.strikinglycdn.com/files/9730596c-d655-4289-885a-941666a71d5e/calendario_mensual_2020_para_imprimir_bonito_abril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc1ab76-ee73-4ba4-af1c-b1befc4388d7/flowermate_v5.0s_vaporizer_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0eba7ea-24c8-40b1-9c0d-156647e6c4a5/62975799539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854092e4-9cec-4a0f-ac69-3593d3e86db6/can_you_lead_a_normal_life_with_adhd.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144447300/vudenupelesixodorakifaz.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424233/formato_pagare_2020_para_imprimir.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144464235/88630399596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c166f57-561b-4793-912b-cbfff3b08f52/pride_and_prejudice_2005_quotes.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/adobe_acrobat_x_pro_serial_number_list.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/f/what_is_the_key_difference_between_aerobic_and_anaerobic_respiration_in_prokaryotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9b1f0a-911f-4715-bd9f-5337e8a4ee5c/63881387483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5a79f9-1e66-49b7-8f70-d33fac515c62/what_oil_to_use_in_honda_pressure_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d1afe6-7d60-4e0d-8a46-1e477250a423/4319099220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e2e5e9-4603-46af-935b-a376886528b5/bilatadas.pdfIn PDF document text
    • http://zikasamu.pbworks.com/f/ejemplos_de_empresas_centralizadas_y_descentralizadas_en_colombia.pdfIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144445866/35827159339.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/age_of_civilization_2_apk_free_download_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2602d87-fb07-4b57-8e65-7f418be2e0bd/72559012783.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 4996 bytes
SHA-256: 872837adf43982a642972bed3ab6a68194d22fdf0892e01a6a5f647f5601b987
font_01_sfnt_off0001387f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387F 10852 bytes
SHA-256: bc6ddf092baa646f2c94a2bc465a08e8035bb92a0944c3f6560fb2c121989dd4
font_02_sfnt_off00015d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D69 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34