Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efe46da40f59be0…

MALICIOUS

PDF

73.1 KB Created: 2021-03-17 13:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 02ca1446cfca428fe5fa90b2c60fe449 SHA-1: b749cd443a9436342f5eddd2878b6ac5796bbb61 SHA-256: 1efe46da40f59be0a7b477fe49284df0a31ba386cc7d80d0e0caca4e99c99666
184 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL is the primary indicator of compromise, likely serving as a lure for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=birthday+cake+hd+video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600a1369ba83b.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/hj2jaib/international_business_management_quiz_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481819/normal_601a824cf3a5f.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/nepobarerutotiwosefu.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/john_deere_950_tractor.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/jhEgfia/wokorafakipepanuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_603969598550f.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/FFsAfgi/booyah_pad_crasher_frog_jr.pdfIn PDF document text
    • https://cdn.sqhk.co/toliximozupa/iacZibO/viridian_coffee_lawton_ok_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/wofutajo/7kijigx/54738220101.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/9778552996.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/61428398185.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/8l4WGdJ/battleship_2_player_on_same_computer_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/ajb7dBf/roblox_promo_codes_october_2020_robux.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/HidKieX/tevevukofubini.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/ad804bf9-6c86-47b2-bd53-9f5af3429b43/70454152323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/928cc6f9-aa2c-4469-8bcd-9f1cad837647/bad_case_of_stripes_cause_and_effect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8846b7e6-1ab9-4dcb-889f-4851e00f9d6c/libro_metodologia_de_la_investigacion_quinta_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b5e43f-3aea-40e2-affc-fa4f69c84195/what_is_a_blended_starbucks_drink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16483d4a-f461-4b77-aa68-7dca4e6e5eb3/cant_connect_my_jabra_headset.pdfIn PDF document text
    • http://segimoto.myartsonline.com/your_brain_at_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c3e8f7-af16-4747-a3ff-c7ac2f7464f9/c_programing_in_hindi_download.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_off0000df99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 5092 bytes
SHA-256: 7332703d2bed5c4d0ba4cafb2a2cf45658c10b69b79e39f4823bae9d90503a59
font_01_sfnt_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 10972 bytes
SHA-256: 4173fb4f102cad7561f9f34afd59fd55a3b23043c23cd7eeba582045f2409ec8