Malicious PDF — malware analysis report

Static analysis result for SHA-256 2954eacb3927fd84…

MALICIOUS

PDF

86.5 KB Created: 2021-04-28 22:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 32d28cb9338733f205fbcb2aaa442ca0 SHA-1: 9659760c0a8b3563c1b0bf9920c47cd3056ea9ed SHA-256: 2954eacb3927fd8448c21b96b4a7be905ccdd38333006e6fe306547772f498bd
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=what+are+the+5+philosophy+of+education PDF link annotation
    • https://cdn.sqhk.co/kiribikiv/gdohh5R/shooting_duck_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/higdhce/wordpress_themes_for_business_owners.pdfIn PDF document text
    • https://paludiwebi.weebly.com/uploads/1/3/4/0/134012690/5700891.pdfIn PDF document text
    • https://ruloxewetufo.weebly.com/uploads/1/3/1/1/131164393/pazusotovedaka.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/tipos_de_androgenos.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/ibjehOm/gmod_gamemodes_for_2_players.pdfIn PDF document text
    • http://zegobudipaju.mywebcommunity.org/chernobyl_accident_report.pdfIn PDF document text
    • http://devuweza.scienceontheweb.net/xuxomopasolilawosisug.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/894b3d.pdfIn PDF document text
    • http://jufanurozud.getenjoyment.net/95107888032.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/haxhKgj/navneet_books_for_12th.pdfIn PDF document text
    • https://vikenefimedok.weebly.com/uploads/1/3/4/3/134390201/89d0d424c.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/linux_command_line_to_png.pdfIn PDF document text
    • https://cdn.sqhk.co/napefabet/6ejxgjL/nazapolulukuzukobaka.pdfIn PDF document text
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/pozogalap-bififotitu-basinarulat.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://uploads.strikinglycdn.com/files/9577d135-d249-4ee8-bfe0-72d93fc642ca/starcraft_hd_permanent_adhesive_vinyl_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b79236-be91-4a42-86c7-579c25b67e51/best_exercise_classes_for_seniors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debb0e86-b7fc-48fb-81fe-549b1322de0e/self_confidence_synonyms_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febce166-e24c-4bac-a772-2510ee262125/is_an_american_buffalo_the_same_as_a_bison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b068718b-3cea-406b-88ac-015fb0f87ea5/the_anarchist_cookbook_original_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d39fd2a-cf98-48ae-986b-f60d11557c79/46380144650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772eb63a-a18f-483b-b5d7-5dc7b6accc8c/math_logic_puzzles_printable_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f1d001-9898-415b-81b8-486b7905ebe7/avr_s510bt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8ad6fd-95c2-4501-9b78-9ee8b2bee262/letuzurepobolisamo.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_off000102ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 5364 bytes
SHA-256: fc9b102c51337e2885cc5f7550ea87b2b5316263d6cca75bb2704323ae4ae7d9
font_01_sfnt_off00011532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11532 12220 bytes
SHA-256: 6452d2928ccea29fb5effbfdb0979cdb1cd9d76d99e29ed24a9ffcb7060327db
font_02_sfnt_off00013ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3