Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d458a59862e9bb3…

MALICIOUS

PDF

83.8 KB Created: 2021-03-10 19:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b5e0c1c4be5ad2377532e79a897ca19 SHA-1: 26a694db56e4af30bb2b179b09517c46572083c7 SHA-256: 6d458a59862e9bb3e91b3d4ce1e16545f5d7dc834f51a32e98b2eeff9efd9909
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm', which is a common tactic for SEO poisoning or phishing. One of the primary URLs, 'https://ponafet.ru/aws?utm_term=how+to+treat+dog+bite+wounds+at+home', suggests a lure related to health information, potentially to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/aws?utm_term=how+to+treat+dog+bite+wounds+at+home
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/vanozo-gafuroxetope-gimoju-zijozima.pdf
    • https://zizobisorodevu.weebly.com/uploads/1/3/5/9/135964877/897878.pdf
    • https://cdn-cms.f-static.net/uploads/4405208/normal_602a090c6545c.pdf
    • http://gilogaviteno.iblogger.org/xinibikewajupowovebanaw.pdf
    • https://bemisawu.weebly.com/uploads/1/3/4/7/134716701/luxomipojutodag_buvile_rulaw_wobute.pdf
    • https://cdn-cms.f-static.net/uploads/4404124/normal_60265c652e8e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/545b84bd-4e27-4217-9c33-4601a2d331ed/chemistry_2_lab_reports.pdf
    • https://uploads.strikinglycdn.com/files/a2f15410-4524-4f5f-a53d-b75536e844e8/john_updike_ap_theme.pdf
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_8044e46a1d8a4c13b0168907ecdce9e4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/90866ab9-5c45-47f6-9581-2a7478d62fea/ddp_yoga_apple_tv.pdf
    • https://uploads.strikinglycdn.com/files/0e757783-b62e-46db-ab0d-1f14637ee05d/how_to_clean_char_broil_grill_grates.pdf
    • http://jogatitow.epizy.com/sowizades.pdf
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_0caf00d778f74e29a7ec562c14688aff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/48d66a55-00e9-4c4f-9925-ea04cdc2736a/39113563774.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_f8fb20648494473ba79881a08d8aa525.pdf?index=true
    • https://uploads.strikinglycdn.com/files/14df7680-3b3a-43f8-b028-1760c962e78f/wepizove.pdf
    • https://uploads.strikinglycdn.com/files/c269efa5-8268-4022-b8fd-80910551227f/2006_chevy_malibu_starter_relay_location.pdf
    • http://vemameb.epizy.com/libros_apocrifos_del_antiguo_testamento.pdf
    • http://tanazutoja.rf.gd/the_big_short_film_watch_online.pdf
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_42da612f003d4d09bf22b819eb222e6f.pdf?index=true
    • http://gizamowamuvo.epizy.com/neumonia_signos_y_sintomas.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd70.bin
d9b1b0b7e005f1d52a79ca4e0accf9534afd3a73b01abd05279b12c8163d7882		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD70 5284 bytes
font_01_sfnt_off00010f41.bin
a9660ac31ff421a72f7627948df42bec053f212459726e2f3b70e624d4602828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F41 10540 bytes
font_02_sfnt_off00013313.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13313 4324 bytes

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