Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95dcfd30740e268…

MALICIOUS

PDF

77.0 KB Created: 2021-03-25 09:08:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a445f440503fe3bf573ef322f90cbcfc SHA-1: c0cf930d3d8148e91a910884513bcc7409eaacf3 SHA-256: b95dcfd30740e268153c3cf1232396cb69126922b6742040f8be2220d8ee0fa1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are characteristic of phishing lures designed to redirect users to malicious sites.

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://dugedepap.ru/strik?utm_term=what+is+management+and+administration+in+nursing PDF link annotation
    • https://cdn.sqhk.co/dutedape/wJhazjB/retuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/xhi4QFp/draw._io_desktop_mac.pdfIn PDF document text
    • http://slampochka.ru/funny_answer_to_how_s_your_dayszbt3.pdfIn PDF document text
    • https://cdn.sqhk.co/kigakikijebo/jfgjJwD/givagikuzuvokoz.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/hriezEq/you_nailed_it_meaning_in_urdu.pdfIn PDF document text
    • http://vknart.xyz/sasokikutim3spyc.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/9JKhcgg/12575334924.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
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_a72d7c5fff4d497d91e6f8a75740afdf.pdf?index=trueIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_eb75fbcc795945e6a13c0026656ab6eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36214339-d2e9-491b-9b49-402181d8a6e1/how_finite_element_analysis_works.pdfIn PDF document text
    • https://6f0a1f77-3195-4c90-aae7-8e5805bb56bd.filesusr.com/ugd/f94fd0_b370e59f0d81471a9819d48ea9f2ae17.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_9d634055794a41eea8a32df2f6bf6602.pdf?index=trueIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_977c2f4cb91b4bb4b1f70b09d1f1882d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5064686-f285-4187-acdb-98653ef2d798/toyota_camry_xse_2019_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70124451-2d8a-40c2-aa89-59eeda8f6540/mp3xd_musica_cristiana_gratis_para_escuchar_y_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/shogun_2_fall_of_the_samurai.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/10923939344.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_6491d9a8679140b7be776aa2b6f784ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a73c9cd-e59c-42de-a11d-d6fb823d37c7/inkscape_trace_bitmap_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616a0287-46a6-4823-a62c-7e7436ff50c1/ipad_mini_5_case_with_pencil_holder_australia.pdfIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_419df7b2a5f04f8f9b567762a6bc5e76.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 5104 bytes
SHA-256: ddf8a7850a9de4a80d9ad3a1f7ce7db621aba6e513f3c46c50d9b19d8daff892
font_01_sfnt_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 10604 bytes
SHA-256: dbefe3870007f0f241faa8a9887012dd74109599ef6706bb1a6cfb58459ef813
font_02_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e