Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9282e0d560154c…

MALICIOUS

PDF

90.8 KB Created: 2021-03-10 02:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 669852dcc42ebd4fd1eda6ebb902d27f SHA-1: e4c83868fdc4ec95965894ba026f38436200b4ed SHA-256: fc9282e0d560154cad49ae73d57073638600713b6042b79e01b589f0ac122d9e
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to potentially malicious content or phishing sites. The embedded document body, though heavily obfuscated, contains metadata related to a snowblower parts diagram, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=toro+826+snowblower+parts+diagram PDF link annotation
    • http://prechambre.xyz/559639175664e0f9.pdfIn PDF document text
    • http://ourfutures.space/48441014876lbe85.pdfIn PDF document text
    • http://czecheducation.space/peabody_picture_vocabulary_test_templatekgc41.pdfIn PDF document text
    • http://blacktea.space/angostura_bitters_drink_guideulah4.pdfIn PDF document text
    • https://dowebirajosem.weebly.com/uploads/1/3/6/0/136010559/23fb305fbf.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/ganifezizefu.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/limaritu_nalisusukota_boxikategaleg_wolitamidoti.pdfIn PDF document text
    • https://sedozexejelem.weebly.com/uploads/1/3/1/8/131871533/4406278.pdfIn PDF document text
    • https://zijoganidilo.weebly.com/uploads/1/3/1/8/131856317/laxufesamoda-raribukuzobaf-mixobeju-fexefetezu.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/powerful_intercessory_prayer_requests.pdfIn PDF document text
    • https://zowutopukanujim.weebly.com/uploads/1/3/4/2/134235103/9439e8441a3.pdfIn PDF document text
    • https://towowiwegopute.weebly.com/uploads/1/3/4/0/134019464/boniketezufad_luzokup.pdfIn PDF document text
    • https://sefidobove.weebly.com/uploads/1/3/4/3/134320077/9693530.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/lesasetoju_kejib.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/isolation_and_identification_of_aspergillus_species.pdfIn PDF document text
    • http://shopwithsale.website/effects_of_climate_change_on_human_health_in_africaib40w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7872a665-f3e2-4d17-8e1d-043326dab554/how_to_write_a_better_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9fa224-5cd4-4e4a-b23a-944a8253d7a2/que_es_homologar_un_titulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d270b414-f8e5-49b0-848e-23e95b3f1414/lotemizew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477e89cc-923b-452f-bbb4-1b79f20a7a3f/mobility_scooter_battery_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce8acf1-f991-433f-8b84-d3e6c27e5e2a/hp_officejet_4500_offline_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abbca69-e3cc-4265-b11d-e19b6df39163/jozunupaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e51164b-ae91-4f8d-9cea-dcab280ddfb4/does_costco_sell_epson_ink_cartridges.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 5728 bytes
SHA-256: 5d6487b7d68373c7daa499da8447053dbf11514930bd4d540e6038d63276c025
font_01_sfnt_off0001293e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293E 11140 bytes
SHA-256: 542bf2b280400e318687c572cf8a38c096b89d801cd2984cce2a3cd7c683a163
font_02_sfnt_off00014daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c