Malicious PDF — malware analysis report

Static analysis result for SHA-256 4606047605691971…

MALICIOUS

PDF

77.5 KB Created: 2021-04-01 02:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e433f386bdf83e937b234d6afdb436e SHA-1: c95e6630633a406f41cd9bea69da2dbcf0f96b45 SHA-256: 46060476056919719989d42a231f3fdc7e46c3ba1d118a82afaf1f400c532a64
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9989

Heuristics 5

  • 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 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://jacksth.ru/wix?keyword=kirby+right+back+at+ya+episodes+download PDF link annotation
    • http://tiwunevebir.22web.org/39144562049.pdfIn PDF document text
    • http://klyshsheff.xyz/radifoxojabutalopalecf302.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/oBDiart/police_auto_auctions_houston_texas.pdfIn PDF document text
    • http://obzorov.site/farm_heroes_saga_cheats_level_821civms.pdfIn PDF document text
    • http://lidzadva.xyz/94410399429f9yni.pdfIn PDF document text
    • http://puzufogekok.22web.org/degagopusejopekanamazen.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/jbig8BK/92387742094.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/ibiiPg3/jegazewalokigizin.pdfIn PDF document text
    • http://jojalipubawil.22web.org/marketing_campaign_template_ppt.pdfIn PDF document text
    • http://fopesekebamit.22web.org/vavafosegodomapuzujijuvej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buziluzune.epizy.com/68024438788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a64fec4-9b7c-45eb-9ec1-17a7d3bbe1b5/61012754163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f989b3d-03c7-42e4-b3e3-8733000b016f/sharp_aquos_quattron_60.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6195ca-4201-44eb-ba1b-3de78b8c2935/consecuencias_de_la_trombosis_venosa_profunda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17603a18-64c8-4d01-bfda-716b9dc91bf5/34986500059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173da3c4-120a-48d6-9f69-f740c0ef0c1e/the_evolution_of_wing_chun_kung_fu_kicking_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381cba29-85ab-4d9a-8eef-cde619497846/special_education_in_contemporary_society_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710b386d-9dd8-48b3-b7ed-0bd98ac4083c/traductor_de_ingles_espaol_gratis_sin_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40c2322-8f44-418d-a8ef-ed74879222c2/tutorial_blender_bahasa_indonesia_lengkap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15860208-9638-4c81-904e-5eaff721821f/ganevesemew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec79fa1-73c2-4cd7-9ebd-cbc5e5e2e972/what_to_do_when_your_bobbin_keeps_jamming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b876ca3-6b0f-4bc8-879c-0568fbe2cb5b/sowuzokolilozelikuweka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a6bf5e-b4bc-4345-9e45-fd60fcd45661/how_much_does_a_2014_mustang_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2c91e1-e8a5-4704-b210-1944a615f7ed/accu_chek_aviva_plus_meter_discontinued.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db0821a-c46e-4e64-9c64-da913061b152/vebosinepepivalobiwavos.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_off0000e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54C 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 5700 bytes
SHA-256: a17d42c336494ad03a761b86fc77087b8f484fe975c5c043bba5061f43d4656d
font_02_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 10832 bytes
SHA-256: 53b42ac85016de006c498557abb51e326d3a8da62462c11e41f13dd9c92095ac