Malicious PDF — malware analysis report

Static analysis result for SHA-256 900610823c8dd615…

MALICIOUS

PDF

77.1 KB Created: 2021-04-20 03:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e034997b5586c19a6c14c70b15b5d58e SHA-1: 212a76cdd576a1a25cc43df68312903ede37cd93 SHA-256: 900610823c8dd61538d1b6fb894d9d657f79e8fbae8813ef94e1d80feb850beb
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are disguised as benign documents but ultimately lead to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack vector appears to be a link farm designed to redirect users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+are+the+characteristics+of+games In PDF document text
    • http://nosatines.mypressonline.com/6083463685.pdfIn PDF document text
    • http://zodimasar.mypressonline.com/58008670432.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/canciones_para_guitarra.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/define_community_psychology.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisazabe/btwin_rockrider_340_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/what_is_rule_of_thirds_in_photography_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25121429-e9e6-4ab7-9228-a67c63426b5c/nalenegure.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/administracion_de_medicamentos_por_via_rectal_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b223f4-8e5f-41a0-9e2a-c9f64a9875c7/69259620837.pdfIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_1b3001922b2d4b3aa9af1949e5c25d97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/zubatasakawagitozaboxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d13ab5-3e66-4860-b699-c71d352780a4/animal_farm_book_chapter_2.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_91e648953f04470780b346b60e166e66.pdf?index=trueIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_1914fe8ee03d45a09c2f8d6054a5efe3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povodijirig/22040806936.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/rolotorevomejub.pdfIn PDF document text
    • https://1dda4824-043e-406b-9213-03d4b91bb4d1.filesusr.com/ugd/7695bb_cd20696d8efe4e8ea04ade1eb5fb4370.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d870939-3d2c-4825-99a9-665a47a9e973/nariseko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bddca23-9131-493f-b109-51b75409baaf/kupufaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ae6d3b-c4ac-4e78-8633-617f261d1dfb/runatutozalefisilag.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/is_misery_based_on_a_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56746d9b-963f-4144-9be2-07f3bf36ab22/what_does_adoption_mean_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/47514356458.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/vabetojepofanureji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e7b2fa-22d0-49a1-aac0-4f9681cfd160/tus_zonas_errneas_wayne_dyer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5919f9e-8ef9-46cd-901d-029471743f9f/86981917962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a25875-cb41-4983-ad2f-49fb23205f05/siseweponetuzus.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_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 5276 bytes
SHA-256: 87b6b3637f60057353c3f0819c3b5d84406aecb59251833d0f454a05886acb19
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 10168 bytes
SHA-256: 55a33f974f788c15163b82e453cab4961a52129350810f0fa87be057823a6ef1

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