Malicious PDF — malware analysis report

Static analysis result for SHA-256 516e23a80a64b980…

MALICIOUS

PDF

80.4 KB Created: 2021-04-13 08:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ca9b7eb8979640dc3be76ef39d1e8a18 SHA-1: 0de909674d48d5a44135c5b8de0ea6d2dc6fc613 SHA-256: 516e23a80a64b980db4b69f8b5299356570c6ac58e7e4194273a57e31ae02b2b
136 Risk Score

Malware Insights

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

The PDF contains a high-confidence ML detection and ClamAV signature for phishing. It includes a lure image that redirects to a URL associated with SEO-based phishing, likely attempting to trick users into believing they are accessing technical support information. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/strik?utm_term=how+to+fix+hinge+on+asus+laptop PDF link annotation
    • http://bivitajuteje.mypressonline.com/ankle_sprain_exercises_kaiser.pdfIn PDF document text
    • http://dexuposi.sportsontheweb.net/wordly_wise_3000_book_7_lesson_14.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/igjfOgj/jetaxagebakanegoris.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/bibJjeI/wotofutolisem.pdfIn PDF document text
    • http://leludezoz.scienceontheweb.net/jusidasoxiwebixitu.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/gdchdie/android_9_pie_vs_8._1.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/jaS76Ui/jungle_animals_images_photos_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/hfhiWij/barrett_jackson_scottsdale_arizona_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mimufedu/hgjd3r0/pottery_barn_15_off_50_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/a47hbhb/3663928193.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/c6c862d1-5835-44a0-a7bf-37dbf680769e/hot_blast_wood_furnace_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569d156f-7504-49ab-a1fc-ddb7d2b89846/power_electronics_notes_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0bd5cf-3f44-4de9-bdf4-37a9def687d8/texas_sales_tax_table_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d4f592-1b63-4fff-b6f6-6ad495cfed97/gaggia_brera_repair_canada.pdfIn PDF document text
    • http://zonurupadul.atwebpages.com/37813301199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965022fc-6566-42fd-8222-5e45bd61674e/axial_scx10_ii_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda09731-11bc-4925-b35d-6484dd4df74f/64574893747.pdfIn PDF document text
    • http://kagijido.myartsonline.com/aha_bls_student_manual_2020_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2642397-3f40-4f32-a25b-2b91c341fc97/what_is_the_definition_of_communism_in_economics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0073f52e-0bde-4f44-b122-d847eb37dae7/what_if_i_never_get_over_you_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d5c55c-1290-4bcf-8b0e-93684253d4b6/lazarillo_de_tormes_resumen_tratado_2_y_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f12f6e-041d-4f02-bc25-af45db660100/donow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5328fa07-fb47-4064-bc75-29c66e5e7ef8/por_que_hay_que_leer_100_aos_de_soledad.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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 5188 bytes
SHA-256: 3816117c80895df00acb9fcfc1777c40b1e510914463a5a5d57f1f823e135244
font_01_sfnt_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 4304 bytes
SHA-256: 8b827f65b0b9f09f607920f64cb6b8b2bdc56fa711d39d8e938afe1e2cfe2e7c
font_02_sfnt_off00010d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 11304 bytes
SHA-256: 02d8ce99bd4b8af97d1ddb993ecba78b7239e624d5a15a609acd0ae8111d592d