Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdc02184051b153…

MALICIOUS

PDF

78.0 KB Created: 2021-05-15 09:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d6dfd7d33ea4728128dfcdb5e168c0bc SHA-1: d2887f0cf85d6f327c4b2db8044ad5f568e87b84 SHA-256: 9cdc02184051b153cbe0cc15091d2cc15bc0820d6f396456f78be68f2a5fda12
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a children's book summary, likely intended to trick users into visiting malicious sites for phishing or malware delivery. The presence of external URIs and a link farm heuristic further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=little+red+riding+hood+book+summary PDF link annotation
    • http://sberbank.services/cambridge_igcse_chemistry_workbook_answers_third_editiongww6c.pdfIn PDF document text
    • http://vkrowl.com/6510858831297onz.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/ijyphdS/ghost_recon_breakpoint_open_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/napefabet/XbgdnuI/89820504846.pdfIn PDF document text
    • http://manoligixave.66ghz.com/roguxazawuzazezi.pdfIn PDF document text
    • http://fokojudup.22web.org/beko_american_fridge_freezer_manual.pdfIn PDF document text
    • http://vadudidubiv.iblogger.org/engineering_mathematics_book_for_gate_preparation.pdfIn PDF document text
    • http://haifaiv.ru/nebijowiborakxib50.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/iesc3jc/74433566165.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vitepadesi.epizy.com/biosecurity_measures_in_livestock_farms.pdfIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_d74d762da3fd48638815eb5f83de83ef.pdf?index=trueIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_4b6987480a9145fd92f2e35b977fa0a9.pdf?index=trueIn PDF document text
    • http://tegegizupe.rf.gd/beehive_class_9_chapter_1_solution.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_db074368f5ef4982a64682f212af27ec.pdf?index=trueIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_5f591132877e45a18e41628f98a5063b.pdf?index=trueIn PDF document text
    • http://bevupun.epizy.com/geloxerot.pdfIn PDF document text
    • http://jefesipi.rf.gd/architecture_residential_drafting_and_design_12th_edition_free.pdfIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_403ba0e577e54c8f86182c3229333ac6.pdf?index=trueIn PDF document text
    • http://pevivudawof.epizy.com/52238228857.pdfIn PDF document text
    • http://filujade.epizy.com/tekumeroporibogasut.pdfIn PDF document text
    • http://jobupozedud.epizy.com/how_to_write_a_research_report_introduction.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_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 5484 bytes
SHA-256: 01a14b335299dac0a6e1ce5ab4be3db4af4566cbdb11ac520d87cf67b5409333
font_01_sfnt_off0001055b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055B 11028 bytes
SHA-256: db69e78c2279ceaaa6a90560e409090d5ad15dd5c006846be94974b7f3a12f62

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