Malicious PDF — malware analysis report

Static analysis result for SHA-256 244edc86b76775dd…

MALICIOUS

PDF

85.7 KB Created: 2021-03-28 13:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f51e2ada66b87f27b45d5fdb31343d1 SHA-1: 74128026894a6aad43b7536e37e89662514d7c49 SHA-256: 244edc86b76775dd28bc286547f4328aa9ca1a2e850924d62990a481ac862560
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, including one to `jumiwimov.ru`, suggesting a phishing or scam attempt to redirect users to potentially harmful sites. The presence of embedded URLs and the overall structure strongly indicate malicious intent, likely to distribute further malware or lead users to fraudulent content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=installed+cost+of+sheet+vinyl+flooring PDF link annotation
    • https://cdn.sqhk.co/devisofage/hsXjblG/best_free_ringtones_for_iphone_7_plus.pdfIn PDF document text
    • http://profibrend.ru/yard_machine_lawn_mower_belt_diagramlo8rz.pdfIn PDF document text
    • http://gakofanotizukab.22web.org/what_is_microsoft_project_management_tool.pdfIn PDF document text
    • http://it50disconto.pro/john_deere_48c_mower_partslhqka.pdfIn PDF document text
    • http://kengoru.space/usher_my_way_zip_download6rgg4.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/hcghmRO/beat_a_dead_horse_phrases.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/diaaAPZ/apply_australian_defence_force.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/ghjWIi3/24177167627.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/gigi7sb/79778269835.pdfIn PDF document text
    • http://center-about.com/aplicaciones_motores_de_corriente_directae79tc.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/T24OpZT/rudafowonumeme.pdfIn PDF document text
    • http://bupetud.xyz/fodufupozexabesojwk70c.pdfIn PDF document text
    • http://erogan-columbia.site/zimsec_o_level_african_history_notesfbd86.pdfIn PDF document text
    • http://gulidomirebo.22web.org/30513346084.pdfIn PDF document text
    • https://cdn.sqhk.co/mizopopowaze/dNjcTVE/christmas_pixel_coloring_pages_ministry-_to-_children.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_252f6400167e40e2a9fb606d90b0a6d4.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_594fbb05e9864a68bf55007182f1b42f.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_eda07754febd4f79890cbc49ae06c26f.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 5380 bytes
SHA-256: 970e84da641a08ffb83ea794dd39208a542eddec3a40b61165b2c5d025798f73
font_01_sfnt_off000123b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B3 10960 bytes
SHA-256: f85cb2b091f5a065ff0f8b7fc8601f999fc7bb544e8bc42bbea30e39b591bf2c

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