Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eaed5c79c95891d…

MALICIOUS

PDF

75.4 KB Created: 2021-04-07 19:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 695b9199731384f64a65545a8ee10958 SHA-1: 2ed6779ff55bef6ba168bfa0e5aa7107bfa3413c SHA-256: 0eaed5c79c95891de5ae95815c74b9c1927ea4eef7e8b82711a43533dadb06c5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were extracted, the presence of numerous external URLs points towards an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=roper+refrigerator+light+bulb
    • https://cdn.sqhk.co/wanadujogo/739qgca/44028804699.pdf
    • https://cdn.sqhk.co/tixuniwe/vOiehe2/androidx_constraint_layout_import.pdf
    • http://fazejajogavu.medianewsonline.com/wemovurokap.pdf
    • http://suwufexez.sportsontheweb.net/todavusorikivewebos.pdf
    • https://cdn.sqhk.co/dogilijesiwu/ifESXhd/idle_zombies_defence_mod_apk.pdf
    • http://xofebuledat.scienceontheweb.net/autocad_drawing_templates.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/doxifuba/google_authenticator_apple.pdf
    • https://uploads.strikinglycdn.com/files/ee28ae02-591e-43f8-a828-235367ffbe72/3065270645.pdf
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_b100b91e683345e8a2783b85df55e073.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fc644822-0b55-471c-a57f-3cce4901a958/caracteristicas_politicas_del_siglo_xix_en_espaa.pdf
    • https://uploads.strikinglycdn.com/files/6ba7354d-3ff4-4cb3-acc7-a116259cfd27/sword_art_online_alicization_war_of_underworld_episode_18_release.pdf
    • https://uploads.strikinglycdn.com/files/5cad176f-81bd-44f5-a213-f16e60237867/hoover_windtunnel_max_capacity_upright_vacuum_cleaner_with_hepa_media_filtration_uh71100.pdf
    • https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_dedb371a0074437cb9834ef86b4cb88b.pdf?index=true
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_3800415d7e7f4a4594df352188c09684.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3d080d58-97ca-4601-b744-15d3e0a45117/86989890993.pdf
    • https://uploads.strikinglycdn.com/files/db80d381-800e-4a43-bd91-622906a8074d/diccionario_mitologia_griega_y_romana.pdf
    • https://s3.amazonaws.com/tabobujimo/que_significado_tiene_soar_con_que_se_caen_los_dientes.pdf
    • https://s3.amazonaws.com/sedimeraxufi/british_royal_family_tree_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/234018bd-1d38-42dd-af66-204c4d170b99/do_lock_pick_guns_work_on_cars.pdf
    • https://e29f0852-aa8c-4fc4-a5db-fcd144ab7086.filesusr.com/ugd/b730be_42cb08e261f04415a08f5a12ffafab37.pdf?index=true
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_64f39072fa28445b821f418f7ee9fdfa.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e894.bin
a0bbaf0430ada2acd1e6d598098a8390b917a011f3cfab55e23a30f35ae18c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 5132 bytes
font_01_sfnt_off0000fa0e.bin
0106ccbc8bdeb5bfd368af376d6a33d8e1e29016b763459d8561eb0eadcbe35e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 11316 bytes

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