Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbc24cef7d83b40…

MALICIOUS

PDF

80.3 KB Created: 2021-05-06 12:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef84595d75a33c31629fa4fc107ce328 SHA-1: 5718ab9be4bfe9a97697109447060492fb195ce9 SHA-256: 7cbc24cef7d83b40fa429cd9ac0b07de1089dc7efd6076e5f5431ced6012aa0c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9964

Heuristics 5

  • 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 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/strik?utm_term=englander+pellet+stove+25-pdvc+manual PDF link annotation
    • http://mikovil.mywebcommunity.org/bna_airport_map.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/idnjf9N/66908819052.pdfIn PDF document text
    • http://govnososal.xyz/roland_micro_cube_gx_second_handzea79.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/tung_acupuncture_books.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/jgGMAgc/32947954623.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/g12krt9/3806458601.pdfIn PDF document text
    • http://1xbet-registrat.site/bavisopu9z6yr.pdfIn PDF document text
    • http://usmileofficial.site/25203281253qdxyf.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/jgVjecg/mother_earth_news_fair_2021.pdfIn PDF document text
    • http://baffer-shop.space/tufejoxewawodu9cysa.pdfIn PDF document text
    • http://kedamijofulufep.mygamesonline.org/psc_bulletin_may_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zuretagugaf/apgc5hf/12744408425.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/formato_de_recibo_por_honorarios_sunat.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/dc9b6df6-3767-4955-97a9-ad9f8ff4a520/28415045538.pdfIn PDF document text
    • http://pogitijerilux.epizy.com/rojinixet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e338bb0-0653-47ec-b9be-90e921d2bff7/who_invented_the_internet_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f099067a-f204-4809-882c-4ba981a13b74/wozes.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/power_factor_correction_using_capacitor_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594b2248-e860-4fd5-93dc-dbb1ef2bccab/what_is_capital_punishment_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394981ec-0f43-4031-8d56-23738836c4e4/kosixub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cabd6f0-5815-4202-b084-30b056ac7cc8/vobomoxoraloriwaxadif.pdfIn PDF document text
    • http://bufolezipozazom.epizy.com/lenovo_t430_laptop_configuration.pdfIn PDF document text
    • http://tosogaxaf.rf.gd/83214324663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd07aa75-808c-4608-8b38-3552c575678f/in_christ_alone_lauren_daigle_ukulele_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a094379-378e-4a42-8658-058f33b37e16/what_is_the_main_idea_of_the_poem_i_too_sing_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3997457-b137-4e00-a878-46f73aacbfa9/maze_runner_3_film_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf3a297-fdd5-4be3-9820-8a7c94a07291/31007622909.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_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 5696 bytes
SHA-256: 6153b7f34d92b0fa303642be27c657cf85dc3bf9d8e365b62d891924d293a8e3
font_01_sfnt_off00010dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCE 10976 bytes
SHA-256: e7c22c2749361aac07820682881776240812d190fb4e42810a134c0adcefe987