Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f7ecd5ff3711c2…

MALICIOUS

PDF

80.5 KB Created: 2021-03-10 05:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8416b87dd327ea2692f864a6099d5944 SHA-1: 52da1959428bd14795cbc08d0a83173e9be0efa4 SHA-256: 06f7ecd5ff3711c270560409d6a5f19b82142c71dadae310652cc4d33214e7af
186 Risk Score

Malware Insights

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

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 0.9998

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://midufefew.ru/strik?utm_term=henri+lefebvre+critique+of+everyday+life+summary PDF link annotation
    • http://kuworekokinig.medianewsonline.com/87687008427.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/2008_jeep_grand_cherokee_laredo_leveling_kit.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/junovafojene.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/gxuhfgi/sefuxusubeb.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/huaUold/97402730421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/totewededexigitizijubadoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d96d660-abb2-484c-be2b-9305541b6778/dish_tv_internet_and_phone_packages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bca8d60-2e05-4e00-9bf1-3dd9c52553e4/web_services_examples_part_3.pdfIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_10c58568acd943dc8130dfa99980df58.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c38fe2f-e055-44db-bda6-0e2e3dfcb5b8/how_many_cubic_feet_is_my_kenmore_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/bivujipuvilobasagoladux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0328b7aa-90d0-4cce-9bab-4c839f221ecc/gramos_a_mililitros_reposteria.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/calendar_august_2019_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ceb4673-fdb1-4c2b-8e21-909b69751a78/elite_23l_digital_air_fryer_oven_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c30ca50-9227-4236-b1cd-aa07d1f908bb/kapediwivugerefakimepemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdfa899-96a7-46a7-873a-de01c8e752fb/what_do_i_do_if_my_gas_fireplace_wont_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b64df95-6652-4c37-90b4-adb81ef6822a/kakisawujunesonobolokalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fdc7ea-6672-4ae0-867e-abb0b2a3467c/how_to_fix_acer_laptop_that_wont_boot_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8b849d-eb5b-439a-be15-21d87a4c6c63/94212377941.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_0f50a17dfe8f4fba880a712bdff0c2fd.pdf?index=trueIn 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_off0000fd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 5556 bytes
SHA-256: 15becc5b8b6a190f5f3554ef0896bd47e532ac72e6c75b69dac47908b6aea246
font_01_sfnt_off0001102c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 10392 bytes
SHA-256: efecdb14f0445f0836fd0fa5628aa11f9d59ed33e1bd285618d30fbb29439d1a