Malicious PDF — malware analysis report

Static analysis result for SHA-256 226182dc2c0fa645…

MALICIOUS

PDF

76.7 KB Created: 2021-04-03 19:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1d8c5ff15f036644814b43dad210d3c7 SHA-1: bb851530b95d955a64a7487e6c67be3e0ec909f7 SHA-256: 226182dc2c0fa64522e41fc563eccdb5f81ebfb6ef2063cbf62aade3c0dd8a62
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://golowaki.ru/strik?utm_term=5+types+of+power+in+leadership PDF link annotation
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/d9b59036df7610.pdfIn PDF document text
    • https://bajarewejewud.weebly.com/uploads/1/3/4/6/134673735/tabat-buwekiv-jawomubuposagun-bevozuruxoluli.pdfIn PDF document text
    • http://esportzmlevent.com/ejercicios_sujeto_y_predicado_para_pnwme2.pdfIn PDF document text
    • https://sazagirisama.weebly.com/uploads/1/3/4/5/134585928/gezanisuxadugisogoza.pdfIn PDF document text
    • http://jaxorad.22web.org/rubuzamevo.pdfIn PDF document text
    • http://rodsfish.club/sydney_secondary_college_blackwattle_bay_campus_uniformeymdj.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/defoxumuku.pdfIn PDF document text
    • http://pumba.fun/cassette_to_cd_converter_software_freewug6u.pdfIn PDF document text
    • http://reduslim-ufficiale.website/319780458780uhli.pdfIn PDF document text
    • https://vivexizakodol.weebly.com/uploads/1/3/1/4/131483194/1989228.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/f9ddfe0c-23db-4edb-871b-0ca70059723a/weber_grill_cover_genesis_silver_b_7573.pdfIn PDF document text
    • http://mesodixole.rf.gd/cobra_xrs_9370_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6233e57e-2519-4e40-9a98-c3d53e194e72/34764206620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e97194-5f02-4a29-85af-9039f5f211ba/who_created_the_giants_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1c2b05-5f1a-4581-9f9c-fe37a943c842/1648585278.pdfIn PDF document text
    • http://memaxoto.rf.gd/femidagedus.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/does_consumer_cellular_have_hotspot_capability.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/bokasalogivemigitikezum.pdfIn PDF document text
    • http://ponawalivemake.epizy.com/90891710909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2657e0ba-bb01-4651-8cf0-4390ec210960/huffy_cruiser_bike_26_inch_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbbcf9f-137f-4e7d-a7e3-0e4dcf5a47b6/how_to_help_your_body_cure_hpv.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_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 5352 bytes
SHA-256: b5aabe2cd9f655a9b120ae221df5cf431ac2e2a71e28397487152af17b8533c2
font_01_sfnt_off000102a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 10212 bytes
SHA-256: 53f904489f791f03df4498d8fc202c582b892531694af3278a64b7e4ca9ac29d