Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ec74023234d81b…

MALICIOUS

PDF

73.7 KB Created: 2021-03-19 22:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b4a3ece798455089df1e3701fd5970bd SHA-1: 4ca28acbf6d7c0f695361a77a1fb5c089493912f SHA-256: 22ec74023234d81b7b922f1b319a1ce6a71139fff46a0656b335f9359310658b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URIs pointing to suspicious domains, specifically 'gimoguvi.ru' and 'rezotu.xyz', which are likely used to host phishing content or download further malicious payloads. The PDF structure and embedded links suggest a lure to a malicious website, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=fundamentals+of+human+resource+management+7th+edition+test+bank PDF link annotation
    • http://rezotu.xyz/princess_agents_season_2_episode_1xgp68.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/bjdtjOJ/usa_facts_coronavirus.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/oZuegdx/3259787589.pdfIn PDF document text
    • http://fopesekebamit.22web.org/8628415125.pdfIn PDF document text
    • http://nefritthebestthing.site/how_to_turn_on_nuvision_tablets97hk.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/G7R0heO/project_report_cover_page_format.pdfIn PDF document text
    • http://gerda-msk.ru/474764057113lhij.pdfIn PDF document text
    • http://vvinorama.website/jimubixun22jr.pdfIn PDF document text
    • http://cabinetsly.xyz/what_the_conflict_in_harrison_bergerona5mld.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/gfhhid6/49100289756.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/2a54f119-13f5-485d-b87d-2f1b67a66207/how_to_reset_a_rinnai_water_heater.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_f842c4f0727f4afb85d6adecac325b4b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/volume_of_cylinders_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/circular_motion_class_11_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/122fb999-6ec0-493e-afe0-07cd7ec07c7a/nexupure.pdfIn PDF document text
    • http://kutobolasiwe.rf.gd/baloterekageb.pdfIn PDF document text
    • http://fitatina.rf.gd/fce_listening_test_1_answers.pdfIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_53cfbfa2e02147d99290d2f30e447c7f.pdf?index=trueIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_da23a0ae581d4e359038d79c7ffb011d.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_a10aaab1cc8b4026a5bded2fcfd8b4bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/838521be-98c9-4d38-a492-aac9e6a7be94/91882559014.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_off0000e10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 5672 bytes
SHA-256: 83b0a396f986fd776f273797557c0f83146bcc4bb71f9009e7e7adb190477349
font_01_sfnt_off0000f43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43B 10716 bytes
SHA-256: b01323618752ab8109a64f40bf7d9dc590a9819f110239f408f0407180c08029

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