Malicious PDF — malware analysis report

Static analysis result for SHA-256 df961e9aa3d1cd4e…

MALICIOUS

PDF

88.6 KB Created: 2021-03-06 12:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 85098cdcfa24440ec65446df08ca3059 SHA-1: 33327d00e76228dd18df4075d6fab2383520c633 SHA-256: df961e9aa3d1cd4e5efd9a49c1ad43ebf720ac61e610f021cd6df23e61035111
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'lozipotod.ru', which is identified as a link farm on disposable hosting. While no scripts were directly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or further payload delivery.

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://lozipotod.ru/strik?utm_term=ukulele+music+theory PDF link annotation
    • http://lovasosirukes.iblogger.org/bushnell_tour_v2_owners_manual.pdfIn PDF document text
    • http://siteznakomstv69.space/60279451094mz1fq.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/1ijjjVb/77121193898.pdfIn PDF document text
    • http://adminhalil.com/wedipuxidobiok4.pdfIn PDF document text
    • http://markettop.pro/57756661040tc8l6.pdfIn PDF document text
    • http://souve.me/listado_de_verbos_regulares_e_irregulares_mas_comunes_en_inglesi32gs.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/v9hikgc/motopozivumakanoditu.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/jiBihd2/how_to_write_a_basic_literature_review.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/10bd3406-1047-47f9-9891-371e1a6a7aa8/is_keller_williams_a_religious_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad249a68-3fb7-4c3f-a6eb-3113ddc63f29/what_does_an_autopsy_report_tell_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e141325-eb4a-415d-97ba-7ace0c9ecb28/padanigereruwejelodezax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad083d8-9c10-47b1-a01d-d5829ed7d324/sezamozosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c50432-1f9a-4369-8867-f4ece54d46fb/write_an_outline_for_a_five_paragraph_essay_on_the_effects_of_deforestation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de7487e-0b8d-461c-9021-e1dd6478d11a/harley-davidson_livewire_battery_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80d01ca-edaf-4776-98a5-c3f3c86dd783/husqvarna_435_x_torq_review.pdfIn PDF document text
    • http://gewapapis.epizy.com/68956044162.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 4988 bytes
SHA-256: b1e91a3f9d47171941f38de46ba3e4bf16e81a21641e55bbf93b0e2a5b92e417
font_01_sfnt_off000119ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EA 11232 bytes
SHA-256: b0c66121477588908985358d4b36dd82ba1e08d0a54a107e03e077ab985895f5
font_02_sfnt_off0001400a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400A 16108 bytes
SHA-256: e11c2eec297efcf1d3cf085d06a172b99a636232c9e67751b412d3b12ef56b2a

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