Malicious PDF — malware analysis report

Static analysis result for SHA-256 648e92fd697b49e0…

MALICIOUS

PDF

84.7 KB Created: 2021-04-09 18:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2a38efa162c5de18e65a5f58ecbe3aef SHA-1: 112b267ef38db37a15ef084f827de52e503a5659 SHA-256: 648e92fd697b49e02a7dbea0cef4ef26df800e8f7ac01fd745eb1534b98e9b3f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to external URLs, with a primary malicious URL being https://soxebez.ru/strik?utm_term=stock+trading+tips+reddit. The document's structure and embedded links suggest an attempt to deceive users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=stock+trading+tips+reddit PDF link annotation
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/tires-zazirutaxitumod.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/texavewur-fopesat-xulufuxav.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/bofevow.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/coriolis_mass_flow_meter_principle.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/programa_de_gobierno_partido_nacional.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/4819cc08-73ec-4b4e-a86f-5738f905dd2c/que_beneficios_tiene_la_leche_materna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e14a2c-d3da-42a0-9c18-19fee0932c13/ejercicios_con_verbos_irregulares_en_pasado_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c13621-62d9-4369-b4cd-87062ffb18fc/diruzafel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcbc362-d781-425c-9d5f-4944e445dad0/voxijivilijudemozoserew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0eb91d-b174-4821-87d0-184b63451660/mushoku_tensei_episode_1_release_date.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_991eff2fee7b4a11abe3fa98efce1806.pdf?index=trueIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_809f2f1097bf4a2690404dfebbf79370.pdf?index=trueIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_52b5955d787d400ca02830d3ea0f854e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c3b0d7-2c72-486a-bbd0-bc0134242d3d/edipo_rey_autor_sofocles_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87479b30-4d4e-4085-9fcf-29b177b68089/kopenojixaget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d41d68-bad2-48cb-ae5c-87af1220ff9a/how_to_get_your_certified_medical_assistant.pdfIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_6ee5ab3ef9fd46468aac1b6093f8f78b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c47bd8e-2a33-4be5-b47d-340e8a0a465d/49225282444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d73587-a273-4bbb-9125-88ebe356490f/big_love_tabs_acoustic.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_off0000fe67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE67 5164 bytes
SHA-256: cb4dce590350adf2076d3d7513994fcdf36781716f6af29737d3f80c30aa3cee
font_01_sfnt_off00010ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF4 11756 bytes
SHA-256: 9fb08620ad8d3ef45dbf92246463b799b74dc3809e5984a6a0c5b54d6468f9b8
font_02_sfnt_off0001379b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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