Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddea34fe5823eaba…

MALICIOUS

PDF

77.4 KB Created: 2021-03-26 03:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 092142c8008f9080c0bd7ab98d72fcf6 SHA-1: c8d5fd6dbec1b39679824301ed3f754800c8109a SHA-256: ddea34fe5823eabaefc0e8c47b039407fe576bbae4d178fd50de549bba5f8643
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=halloween+multiplication+coloring+sheets PDF link annotation
    • http://puzotupisebi.66ghz.com/walumakezekek.pdfIn PDF document text
    • http://lopavatizurafe.iblogger.org/60618196112.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/9577315898.pdfIn PDF document text
    • http://pelaberofusej.iblogger.org/emociones_toxicas_bernardo_stamateas.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/6416e3f650d7d.pdfIn PDF document text
    • http://potoborotagivud.22web.org/scattergories_list_4_answers.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/kokoru.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/multiplication_worksheets_4th_grade.pdfIn PDF document text
    • http://kumadogeka.22web.org/wamepupukivupax.pdfIn PDF document text
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/8762442.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/leseziva.pdfIn PDF document text
    • https://maritomumotoko.weebly.com/uploads/1/3/4/5/134512683/vavememokulilefu.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/dd2e7061-1f66-4db4-b225-dc36adfc9aae/why_does_my_acer_chromebook_screen_go_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac01d5ea-c617-49b9-8705-cf661d282ae6/english_books_for_beginners_cambridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edc99d2-8364-42b9-a181-cf23203c7565/68428107208.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/lasikevis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd925e3-6846-464c-a168-75fa3e8ff944/how_do_you_reverse_search_a_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d766c2d6-b3d2-4790-9731-88088ed71d18/cuantos_metros_tiene_1_decametro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfadb3e-84d4-4803-9f93-380bebc36c49/gre_online_quantitative_practice_test_free.pdfIn PDF document text
    • http://bigofuzov.epizy.com/general_election_to_lok_sabha_2020_annexure_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d533bf8e-2b97-404b-b76b-cbee5ec950fc/diferencias_entre_metal_gear_solid_2_sons_of_liberty_a_substance.pdfIn PDF document text
    • http://wovefekekixuji.rf.gd/powerpoint_templates_computer_science.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_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 5400 bytes
SHA-256: 66f9fc3010ce8ec7de60a6794d459c3ee21a51577d04c624084c6a898b64b1a5
font_01_sfnt_off0001035f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035F 10844 bytes
SHA-256: 727251018388b0505344c3846ecfa9a2bed922d4d1928d12544c7ef26fa5e19e