Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda2549f8a24d84b…

MALICIOUS

PDF

73.9 KB Created: 2021-03-27 15:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0077d0d131aad5e909c89c363aa7f29d SHA-1: 54e9929423b0a193a322f487bc35b472ba979b64 SHA-256: eda2549f8a24d84bbc1acb3e3620e8f6b9eb4677c4bdcb54644b6ab1bea7059d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 presence of external URIs and the link farm heuristic suggest an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/123?utm_term=nissan+pulsar+android+multimedia PDF link annotation
    • https://cdn.sqhk.co/malevevipali/40ig6hb/98644033494.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/dihggLt/recession_definition_economy.pdfIn PDF document text
    • https://cdn.sqhk.co/babijuvawov/6FdievM/toasted_sandwich_maker_target.pdfIn PDF document text
    • http://mufezupep.iblogger.org/shadowrun_almanac.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/asus_q551ln-bbi706_notebook.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/receitas_biomassa_de_banana_verde.pdfIn PDF document text
    • http://damewonuseba.sportsontheweb.net/big_data_analytics_methods_and_applications.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/jeronodifokomor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_641f2138da6c42dcba5cfde24070854c.pdf?index=trueIn PDF document text
    • http://gitodake.myartsonline.com/73680928762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f288edf2-f0e8-4f28-8ebd-ca5a5216b362/romeo_and_juliet_act_1_worksheet_answer_key.pdfIn PDF document text
    • http://tesaminovosino.epizy.com/honeywell_programmable_thermostat_th6110d1021_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f13deb-413f-4341-bff1-cea10e376fe2/in_another_country_summary_in_nepali.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_5f38657839684fa28c704ea0336cffd0.pdf?index=trueIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/havells_ceiling_fans_catalogue_with_price.pdfIn PDF document text
    • http://vumarolewe.epizy.com/iodine_clock_reaction_lab_report_introduction.pdfIn PDF document text
    • http://vixuzuvubus.rf.gd/sikesidamafibineka.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_87c2c83c941f49bab1edd04d62d80501.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_6b4ddc2cb69f44b990215e5c6b90de1b.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_off0000e1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 5072 bytes
SHA-256: 11c549a4862643bba8f0805b0eca134b38d5e09b1a419d5136a28912c1f3df1d
font_01_sfnt_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 11028 bytes
SHA-256: 2742013b10f3e2502fe9407f81295b3fdca8a1b425fb7f16c538546b19a52cbb

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