Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fba8e11a4530f8c…

MALICIOUS

PDF

76.5 KB Created: 2021-04-22 00:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 78982943c3c8375c0049a19bfb749c4d SHA-1: 2247ebc4c80b66653463b325daef613772f1cbad SHA-256: 5fba8e11a4530f8ce0e79ad216bc67b692712ae7d4e611c73193d16c01fa67b5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=niv+rainbow+study+bible+purple+leathertouch+indexed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455681/normal_606085b075c65.pdfIn PDF document text
    • http://tedewirivotu.iblogger.org/50273080820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_604e73877fb07.pdfIn PDF document text
    • http://xuwivezotuw.22web.org/anti_theft_wheel_locking_system.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446765/normal_5fe256e518d95.pdfIn PDF document text
    • https://cdn.sqhk.co/vusunuvaka/qjhbyje/british_airways_787_premium_economy_trip_report.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/deqsjib/briefings_in_bioinformatics_abbreviation.pdfIn PDF document text
    • http://logowiwubapokar.iblogger.org/maniped.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_5fdaa9f48591b.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/hj7jfgh/63174624615.pdfIn PDF document text
    • https://cdn.sqhk.co/zesozote/Tgfifie/jafomabopenape.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/jfhhPy4/server_manager_remote_desktop_services_collections_missing.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/gje5ih5/89535729120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483854/normal_606184e5a0167.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/Vhbgcjd/gun_striker_fired.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gixoluzex.epizy.com/90405893242.pdfIn PDF document text
    • http://piserujirabubam.epizy.com/cant_see_shortcuts_on_desktop_windows_10.pdfIn PDF document text
    • http://luzoputaran.rf.gd/toeic_barron.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/69695940371.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/oracle_database_security_audit_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/92270638578.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_off0000dcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC4 5476 bytes
SHA-256: c9ec9285937fa8100c67c3caad0d6eb596052e6ead5aa1fd6823d5db49400d22
font_01_sfnt_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 10924 bytes
SHA-256: 70dcb404b7c2371d0e981764ad824916fbfede22d1d2a5041ee3b632db427ee7
font_02_sfnt_off0001149f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.