Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0a4be180803767…

MALICIOUS

PDF

76.9 KB Created: 2021-05-06 01:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 003a418d09a1f4de6978e6d58f2f13a9 SHA-1: 7cadb99dac4bc865eeb36e9e98c4d2ff915f43a1 SHA-256: 5e0a4be1808037679dbe14b29ea74bea31e15d482c49fe31c46a171a84e8c215
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=basic+math+and+pre-algebra+for+dummies+2nd+edition PDF link annotation
    • http://edarudost.online/6193174497rdnbs.pdfIn PDF document text
    • http://help-mediasupport.com/astellia_can_throiv.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/hhcg6Gf/colt_express_playmat.pdfIn PDF document text
    • https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/gogum.pdfIn PDF document text
    • https://cdn.sqhk.co/zedujunuwuxe/difjeja/99181277390.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/j6DDgis/numedufelopewolizibufor.pdfIn PDF document text
    • http://mihetos.xyz/does_costco_sell_la_fitness_memberships1ejvp.pdfIn PDF document text
    • http://carinsusa.com/is_the_book_the_face_on_the_milk_carton_a_true_story8ej8m.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/Q8r3idn/51020399504.pdfIn PDF document text
    • https://tuwakunasuj.weebly.com/uploads/1/3/0/8/130874309/jegagi.pdfIn PDF document text
    • http://persequenteamsohbet.com/telugu_stories_20177b0ps.pdfIn PDF document text
    • http://lovechat24.club/redbird_simulator_manualki7x7.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/jcggji4/zanefenipaxezojuzinitawu.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/Qdgjav9/3590536756.pdfIn PDF document text
    • http://salleapp.xyz/asus_router_rt-n66u_default_passwordvsn1c.pdfIn PDF document text
    • http://itanto.space/physics_mcq_in_hindi_downloadvtqr0.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/bf47e426dd.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/hKjhpjc/teaching_strategies_mighty_minutes_for_preschool.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/283e7860-a78b-4e88-b911-878fea8a268d/gaggia_brera_espresso_machine_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a61cd2-b4c2-46e3-ac3c-2c99827dd131/definicion_y_antecedentes_historicos_de_la_geometria_analitica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6751bc7b-5194-4c74-b954-30fb347c2a47/best_sap_mm_training_in_hyderabad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267696c8-324a-45a9-870b-17fbf6555618/how_to_unjam_a_bostitch_electric_stapler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2501bff-2a88-4798-bffb-f664c2840dcd/sigesajobabe.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_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 5924 bytes
SHA-256: c3c6c658f614d1b32405dfe11c2f4667f970bb008cad7b83ca4e0aa8d4627498
font_01_sfnt_off00010036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 11044 bytes
SHA-256: 80144b8118ed2b21f43540fd28ee3bbac1c5744a6df0ae3226d7a1371544cb02