Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed92ca57503057b0…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 10:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: bc74ecc74c1c36ebfe8c131b5c474c6e SHA-1: 47be0f61a04710f44d6474a1887f1aac9a55b0c6 SHA-256: ed92ca57503057b0e80ae327e577628f883b37cea1e5457cb2723d3b8ffac23c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a suspicious domain, likely part of a phishing or scam campaign. The PDF structure and embedded content suggest it's designed to trick users into visiting a malicious site, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=cnet+review+free+pdf+editor PDF link annotation
    • http://mizifasurogik.mywebcommunity.org/bofewamajotoguvevowaf.pdfIn PDF document text
    • http://xivatididoxu.22web.org/glencoe_mcgraw_hill_geometry_textbook_answer_key.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/english_russian_business_dictionary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_91c8ffada2a5454c8de2795cdbe8ce62.pdf?index=trueIn PDF document text
    • http://nevabaza.atwebpages.com/figunagas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aec607a-d4c1-4a5c-853a-af8f6722c74e/signs_of_a_cystic_pimple_under_the_skin.pdfIn PDF document text
    • http://pasumogebono.rf.gd/multipart_form_data_json.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_d699997877264fc5ab21bd4c0ba4a144.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e478874f-9758-459a-aab4-cd9baf302f49/26246972688.pdfIn PDF document text
    • http://zunerewema.epizy.com/samsung_wa45k7600aw_a2_not_draining.pdfIn PDF document text
    • http://vepilezora.epizy.com/kapelitet.pdfIn PDF document text
    • http://xapemekofutomun.rf.gd/doxakosefevezot.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_ba6b6282de6d4bde975fb0ea198c5794.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c20e67b-e374-46bf-ab52-b6f494b4f6de/68682849452.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_12ad9e0b8d2f48188badb9a94cbc368a.pdf?index=trueIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_0f7ed37abc194c9e89c080c73beff4aa.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_64c50539be324b59b61ea01b2d7695e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0e60a6-b436-41ec-8dfb-511c2c9346cc/how_to_check_echo_test.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/29698720757.pdfIn PDF document text
    • http://lofuwokapowudug.rf.gd/46078839061.pdfIn PDF document text
    • http://bibezakomi.myartsonline.com/xuvepag.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/72404644655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0601d711-6bc4-4a28-89ff-e362c9723e7f/livejotepinom.pdfIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_80a10080397f493f9f13bb819810d940.pdf?index=trueIn 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_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 4672 bytes
SHA-256: dd337eb4a9ac112b8d28fdc14c217c7ad4896a6c4ba2e366f929c81fc7144833
font_01_sfnt_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 10984 bytes
SHA-256: b3d0157226c36000a7563ccd2e1ffa237b5778ca8b328e083e3b069da1e3eb35