Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5f32b9e7464f68…

MALICIOUS

PDF

70.7 KB Created: 2021-04-17 09:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 62c599e9349e5c93be1796cbcc942dd9 SHA-1: 11de7dfb51c0192b293431a1ec6bee047424d377 SHA-256: 2b5f32b9e7464f68cced6434a73649aedba6a635db5c6af9055484c70a4e89df
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://lozipotod.ru/strik?utm_term=leer+la+biblia+latinoamericana+en+linea PDF link annotation
    • https://povijovo.weebly.com/uploads/1/3/4/4/134463476/c76c0c45.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/alien_1979_full_movie_in_tamil.pdfIn PDF document text
    • http://rawenspant.online/gewerikevunimugenajelovocl1yi.pdfIn PDF document text
    • http://xekepova.iblogger.org/70548338612.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://dofabogadu.weebly.com/uploads/1/3/0/7/130739956/puxafu-ranataju-ruverinusov.pdfIn PDF document text
    • http://vemexuzalunep.22web.org/pisokilopavuzafusuxenox.pdfIn PDF document text
    • https://jevuzukolusiwu.weebly.com/uploads/1/3/0/7/130739503/b2816dac2ed9c.pdfIn PDF document text
    • http://allroadkamchatka.ru/denofir4vxa.pdfIn PDF document text
    • http://thedouche.xyz/what_are_the_different_types_of_corporate_cultureattov.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/dd2b1064-365f-4731-9644-83412e6f6186/dream_meaning_of_seeing_apple_pie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef70112-b6ef-4049-81dd-b42a663092cf/wemep.pdfIn PDF document text
    • http://roditopimisovo.rf.gd/how_to_turn_on_hdmi_cec_on_element_tv.pdfIn PDF document text
    • http://xidesaso.rf.gd/26303151510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b829f240-0a32-4fda-9454-0abdfd2ae4ef/hamilton_beach_single_serve_coffee_maker_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93e0ca5-fea3-463d-853b-70b5ed76763e/ganesha_ashtottara_shatanamavali_in_telugu_mp3_free_download.pdfIn PDF document text
    • http://nurupejizijij.rf.gd/personal_immunization_record_ontario.pdfIn PDF document text
    • http://wulakutagugizi.rf.gd/schengen_visa_application_form_belgium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc666ebe-7a58-4261-889e-4ac67cfad24e/como_homologar_titulo_secundario_en_espaa.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_off0000d8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A8 4848 bytes
SHA-256: d2e997623bb0b71d6970f3522412769cfb16b1ede083878914e58dcc08d1bfcd
font_01_sfnt_off0000e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 10612 bytes
SHA-256: 3032db115aa2abe6e99fcb821b55da6dbe0f8078ec2ccd880061cf1fb340cef2

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