Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5db0ff306e7139…

MALICIOUS

PDF

72.0 KB Created: 2021-05-14 08:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f1590e555ed9dffcf7f8da824de02c4f SHA-1: b6d718af7f43d6925607aff91f90a4494d3b0535 SHA-256: 9c5db0ff306e713963abc1bdb449921fafe6b4a6cfeddde3bcd1fc5f737365f9
126 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs, such as https://dugedepap.ru/strik?utm_term=what+is+the+salary+of+an+operations+analyst, are indicative of a lure to a phishing or malware site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=what+is+the+salary+of+an+operations+analyst PDF link annotation
    • http://select-get.top/45551311432bdhjx.pdfIn PDF document text
    • http://probkin34.xyz/brain_activation_techniques6xfus.pdfIn PDF document text
    • http://cleaner360.shop/rumefogikmog.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/prparation_et_peinture_carrosserie_auto.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/dcgzNgi/microsoft_launcher_no_app_drawer.pdfIn PDF document text
    • http://glasshookahcatering.com/63714525215epemz.pdfIn PDF document text
    • http://stakingyfi.com/xovukotelijapuix3di.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/igxqgjR/7975572548.pdfIn PDF document text
    • http://hugertely.xyz/labofepuduneboy3s49.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/gubakokisusuvi.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/aircraft_maintenance_engineering_salary_per_month_in_dubai.pdfIn PDF document text
    • http://fixmarker.fun/99161175541zjd64.pdfIn PDF document text
    • http://maddot.space/annual_audit_report_contentsw7dy9.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/c9f7938d-f47d-4e64-b1e7-1d7413c1361f/12766411003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a601d97a-f4c0-4bda-ba02-cebf17995117/72812044367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415a2461-a85d-4ef3-b6f4-5ffd764ecad7/procedure_to_get_iso_9001_certification_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2889fe83-ab6b-462e-95a4-0943daf7a019/surah_al_mulk_full_mp3_free_download_mishary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19831fb-1138-4ccd-8968-910840fca9e4/siregak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b8950a-8dca-466d-8fb2-3e4bedc6f25b/disuwixoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c98243-4310-466d-aa96-02c048edc70c/371378407.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_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 5104 bytes
SHA-256: 7fcb200a4a9d0f8edba2f9122273a5161853836107024ff527fad32a947edad3
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 10308 bytes
SHA-256: df2281efee071aedcee7a8d9dac965230ea659b9721399fead39072163961ec0

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