Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb961c32f1a42d7…

MALICIOUS

PDF

71.8 KB Created: 2021-04-24 00:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b2ff7c00d45fe3854330ef98575dab20 SHA-1: 7d1c5d8a7de792089c73f93b151b09a7457b0dec SHA-256: 6eb961c32f1a42d713a65758222fda7b265a5e72b38f9fcf90408322907089ad
126 Risk Score

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 redirection attempt. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=bosch+nexxt+800+series+washer+manual PDF link annotation
    • http://wusozupu.mypressonline.com/74067506124.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/jinedofaravaluvap.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/86924943313.pdfIn PDF document text
    • http://ledoxune.22web.org/what_are_the_key_differences_between_transformational_and_transactional_leadership.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/83082326161.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/48892410652.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/zP477jb/basket_wall_art_set.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/5gfijF0/65158724860.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxovugefulo/Kjagdhg/53791225358.pdfIn PDF document text
    • http://ravevuzovije.mywebcommunity.org/sidefaroguruviliru.pdfIn PDF document text
    • http://tesilav.sportsontheweb.net/wound_care_education_institute.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/phone_says_line_in_use_centurylink.pdfIn PDF document text
    • http://nopiwez.22web.org/sanunenodizotovo.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/ab083f7c-2d37-48fe-8db0-e340571911ba/muzusesurejurilowivenawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eaecc05-5d40-48f0-a7f6-6dafe81b9bc2/tetofajaxuroro.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/internet_como_canal_de_venta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56096019-5167-45ec-a61d-9e9b71924f6f/11789935640.pdfIn PDF document text
    • http://jajabadexorulab.rf.gd/abstract_on_bacterial_concrete.pdfIn PDF document text
    • http://tapimezekuboj.rf.gd/how_to_program_code_on_schlage_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e3aa1a0-263b-412b-b04a-e709e7f7285c/34184702422.pdfIn PDF document text
    • http://pejemevogoge.myartsonline.com/mafaxodudigowewijibit.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/wellness_wheel_activity_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10449025-7e3c-414b-aacc-bd465707b0ad/91329752800.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_off0000dbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 5584 bytes
SHA-256: 43661a450b98b2b66ee408f207a3aa2d89cdbb82986c4ed2ab328322eb97e748
font_01_sfnt_off0000eecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECC 10296 bytes
SHA-256: ce3715db0304cdfb74a1e5672a75de47966722c20a8a01369e84349d34b28bc9

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