Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef859e6915046ca…

MALICIOUS

PDF

85.3 KB Created: 2021-03-07 06:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3f4df5fc3e3a56d309ea974cc9fa5371 SHA-1: 4952a9c804880f0500d99280c6857e784930ca3f SHA-256: cef859e6915046ca618fe80732c7755820a3e8550a3a0c70afaea8fa4bd8f961
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable or unknown domains, suggesting a phishing or redirection scheme. The document body, though heavily obfuscated, appears to contain keywords related to printer ink cartridges, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=canon+mp160+ink+cartridge+reset PDF link annotation
    • http://hurleyshamburgers.com/58974223766bjeax.pdfIn PDF document text
    • http://hdsamara.ru/tewatuloje4ftrp.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/active_and_passive_voice_exercise_class_7.pdfIn PDF document text
    • http://zagavogafewakud.iblogger.org/how_to_use_apple_cider_vinegar_to_cleanse_scalp.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/kozulef.pdfIn PDF document text
    • http://raifaisentapp.online/the_namesake_jhumpa_lahiri62p90.pdfIn PDF document text
    • http://zarozunaxa.iblogger.org/58847536101.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/how_many_carbohydrates_are_in_a_taco_bell_crunchy_taco.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3e22df6-b199-4cd4-80dc-afe7b42bde8e.filesusr.com/ugd/3254bf_0afa94757a364e2c8f3d93c04c15d6ef.pdf?index=trueIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_a3a5699ff6d84e518c7cadf82298a3e8.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_f2a70e3f60e24e84a0969d1a7932d337.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/cash_flow_statement_mba_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c905a34-8614-4ded-ac63-02ba84d864ea/47306799414.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/74463879401.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/jiniv.pdfIn PDF document text
    • http://kewumexor.epizy.com/56294615979.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/bayko_chukli_standvar_movie.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/simple_past_tense_regular_and_irregular_verbs_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b0f042-b4d9-4d23-a345-af79319241b5/storm_front_2_mallard_decoys.pdfIn PDF document text
    • http://jepokigebi.epizy.com/what_is_a_balun_and_how_does_it_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193c5a77-788b-4280-9d9e-bd7dbb3cf39b/gasiboveruxitopifib.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/bid_bond_and_performance_bond_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67508fc3-df53-4e43-a3a4-e763787762a7/what_are_2_examples_of_incentives.pdfIn PDF document text
    • http://gagolugumetuvo.epizy.com/rice_krispies_nutrition_information_uk.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_off00010f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F75 5676 bytes
SHA-256: 598e68700f24ca71557bd575662176e85be9751555e8acaad7cbf9edb85c1741
font_01_sfnt_off000122b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B1 10972 bytes
SHA-256: feb835e26e6d814330b52ccc6f5fb388c039dffbd7fa1d1a65ec4092e54bf334

Open this report in the interactive analyzer, or submit your own file for analysis.