Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ad47f3f679a29e…

MALICIOUS

PDF

85.2 KB Created: 2021-03-27 11:30:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 565bfbb05701c3994f145b1f1dcc2709 SHA-1: eea6a4af29ba16324a9b1f8f93d263777c6531c7 SHA-256: 41ad47f3f679a29e5e4aedd9feb24f68df29f35fbe3c21f8e15677992d383630
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The document body, though heavily obfuscated, contains text suggesting it is a lure related to 'Divina commedia purgatorio canto 1 pdf'. Numerous external URLs are embedded, many of which appear to be part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://midufefew.ru/strik?utm_term=divina+commedia+purgatorio+canto+1+pdf PDF link annotation
    • https://cdn.sqhk.co/dolitife/PMjbjff/all_about_history_book_of_ancient_rome.pdfIn PDF document text
    • http://everydays.space/libro_introduccion_al_estudio_del_derecho_cardenas_garcia_jaimery447.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/abbyy_finereader_birletirme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_6058b129393fa.pdfIn PDF document text
    • https://kezeminitiwo.weebly.com/uploads/1/3/4/4/134476020/mapalotarosodid.pdfIn PDF document text
    • http://on-arenas.com/hawaii_five_o_original_episode_guidebgvcu.pdfIn PDF document text
    • http://noverst.xyz/decadry_white_place_cards_templateplq17.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/diaphragmatic_breathing_exercise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_601cd2774e556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_5fe69dd4aac89.pdfIn PDF document text
    • http://smartycredit.info/gusodepabixakep3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_603f30fc0e629.pdfIn PDF document text
    • https://tiseworadew.weebly.com/uploads/1/3/5/3/135317060/ce293fe.pdfIn PDF document text
    • http://olx-delivery.cc/talulipalaxupuzizpv2vh.pdfIn PDF document text
    • https://jegewovujukevu.weebly.com/uploads/1/3/4/5/134507091/2691349.pdfIn PDF document text
    • http://adminhalil.com/adding_rational_numbers_worksheet_7tr2dak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369328/normal_5ff5cf2f7f935.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/B3vigie/victory_day_russia_2019_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/fidisutipamu/Ijciaos/skywars_maps_for_minecraft.pdfIn PDF document text
    • https://girezerel.weebly.com/uploads/1/3/1/0/131070389/24693d83.pdfIn PDF document text
    • https://fuvexowigirupog.weebly.com/uploads/1/3/4/8/134896800/a73ddc9c4de2d.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/josumosomiralov.pdfIn PDF document text
    • http://lavkavkusa.store/how_to_recline_fisher_price_snugapuppy_swingrflx5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 5376 bytes
SHA-256: 2dfe9571c6360fbe962f099bbefc6ce8eb9197710d6a0ab515fdd46bca32b795
font_01_sfnt_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 11620 bytes
SHA-256: af2a1be5c72e8880de3ea379867e98eb0fa836459a8140095f5e8bf24adc4ab8

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