Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be5b13ebe687917…

MALICIOUS

PDF

98.5 KB Created: 2021-03-22 05:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e72abbc20161f9960f06d477c9d7de5d SHA-1: f21b2e2cb0131c822cae3d1b2462306dcf84094e SHA-256: 6be5b13ebe6879171e879bac5c600c12a0672b6503107a12ca7057e6cc4a066b
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, characteristic of a link farm used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/strik?utm_term=things+to+say+for+death+in+family PDF link annotation
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/pizewejoras-vilakanar-lawezomavaxono-badedubevumuxi.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/java_8_download_64-bit_linux.pdfIn PDF document text
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/seromuvasateguf.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/astm_a537_class_1.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/easy_piano_songs_with_letters.pdfIn PDF document text
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/rukonexufazi.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/5dfc04b9-42eb-479a-a417-7d1255c7a5f8/survival_food_list_australia.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_c855f3fef6c9450b9f532f47849d8485.pdf?index=trueIn PDF document text
    • http://pavinudoj.epizy.com/how_to_make_a_deep_house_track_on_garageband.pdfIn PDF document text
    • http://zefexulipovi.rf.gd/anganwadi_form_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d742a49-2a6c-477e-b351-9d5be310680f/67008542312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb67385-5f67-415a-ba60-0daafabfd4f3/kuxuvajebosujobaliwep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d31af24-a376-4bd7-9cfd-705b674750c1/the_count_of_monte_cristo_anime_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae993556-3343-4a41-8429-2f9a11568d69/what_is_the_average_speed_for_a_roller_coaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021ed5cc-b81d-47a8-99f7-bee9ce81f40d/47245026619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae42129-010f-485d-86f3-2cbd817067db/banukefemogakavilowaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bc553a-5274-4320-beca-9570f79c15ce/xekewanewekozu.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_e66087056e0d4a89bf9c0cd0101f940a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1244c96-3f49-470a-afcc-1853ea4b01dc/osha_safety_certification_requirements.pdfIn PDF document text
    • http://xufizup.rf.gd/9180997659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbec2a5-4efd-4ade-9dde-346dad6a1bd9/tizevemumopu.pdfIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_3e3cb1dff948490bab9ffbdb8e7014ae.pdf?index=trueIn PDF document text
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_013c82d6e37748d09ef44018ed630912.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_off0001412d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412D 5372 bytes
SHA-256: d5d87d6bf1e05672b18bd7ad46d869e309e8b42ff1936e8ee300df2ace8a2612
font_01_sfnt_off00015353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15353 12196 bytes
SHA-256: fcdae05bc1aebb1376fa4fa183739faec24662c619b46bd34dc8a9513cf66706

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