Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1baca422cafd3c…

MALICIOUS

PDF

80.8 KB Created: 2021-03-17 21:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 283ee0516cbdc07c9acc42ca2edc49d5 SHA-1: bbfa974680512fb2692843b990f53e8d6c11b0c3 SHA-256: dc1baca422cafd3c462ddd66174d7dd4e740b136362ba82bda176890958d4c21
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://baarspo.ru/award?keyword=length+conversion+table+in+pdf PDF link annotation
    • http://raliwoze.iblogger.org/famous_carl_rogers_quotes.pdfIn PDF document text
    • http://jidameke.mypressonline.com/memezetizunivesarina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_60252aca3fe11.pdfIn PDF document text
    • http://tosidegomutif.iblogger.org/samsung_55-inch_q70t_4k_qled_smart_tv.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/bash_script_example_execute_commandrgtzv.pdfIn PDF document text
    • http://physcoo.com/keto_cookbook_target6zvl3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_600a9aa0d3f25.pdfIn PDF document text
    • http://vowewudimo.mypressonline.com/10133285742.pdfIn PDF document text
    • http://kujisasu.iblogger.org/how_do_i_get_my_hp_officejet_pro_8610_printer_back_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407991/normal_6006ff7b1f369.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/xamume.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/736c41e0-6beb-4ebe-9ac3-7dd3c184de54/how_to_look_up_driving_record_in_florida.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/sat_hawaii_test_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b28a472-7e19-4679-a793-063a7dbab708/51490883878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816350fa-85e5-4653-b0d7-6929d096320a/tadoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208d1507-8b47-4de7-bd59-18d49dd642f7/factoring_polynomials_double_grouping_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f89962-b57a-4ffe-a706-869742923957/daddario_classical_guitar_strings_amazon.pdfIn PDF document text
    • http://bojiwivepexa.epizy.com/far_from_the_tree_robin_benway_setting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/befedc85-8c4c-4de6-8a64-6226b5131756/how_to_change_network_security_key_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af83f208-b5f3-481f-b83f-bd84716c57fa/18056224847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9299f49-d725-406b-b71d-e5dd4777abb3/duromax_xp4400eh_dual_fuel.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_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 5560 bytes
SHA-256: f6bb556faccdfea060d9d9e23e97f095bbb4bd26a44866ec107b949f08799319
font_01_sfnt_off00010de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE1 11760 bytes
SHA-256: 6d9e445925214b7259359eb39bf97a2a588bf752b2e7d7a6226881a957f2055b

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