Malicious PDF — malware analysis report

Static analysis result for SHA-256 217b0b269b4515b6…

MALICIOUS

PDF

74.3 KB Created: 2021-03-03 13:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 185b3a48884b76df7d4f16a7d5b58096 SHA-1: 4b8f87ae2ec10cc7fef3c95365ed4c90d6fd793a SHA-256: 217b0b269b4515b626443baddd08168844a6a2e1b85a8431e18ead85065f8cc8
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external links, including one to 'dugedepap.ru/strik', suggesting a redirection or download attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, a common tactic for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://dugedepap.ru/strik?utm_term=gre+exam+practice+papers PDF link annotation
    • https://vobelerevofago.weebly.com/uploads/1/3/4/5/134596527/rijuxumosux.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/radio_shack_scanner_mods.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/28152936361.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/wuvotuju-xiziwezu-lajujowoduxad.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/similar_triangle_proofs_worksheet.pdfIn PDF document text
    • http://rometinanuk.iblogger.org/97651082564.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/jidotoda.pdfIn PDF document text
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/3390730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/citizen_blue_angels_watch_stopped_working.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/significado_de_un_uniforme_de_enfermera.pdfIn PDF document text
    • http://kopolug.myartsonline.com/kenmore_refrigerator_ice_maker_not_working_no_water.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/23667284588.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/the_lord_of_the_rings_the_return_of_the_king_gameboy_advance.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/centroides_de_areas.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/lindsey_stirling_roundtable_rival_sheet_music.pdfIn PDF document text
    • http://rurudowofalav.rf.gd/5238446087.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/poe_power_leveling_guide_3._3.pdfIn PDF document text
    • http://vexeger.rf.gd/anime_studio_pro_character.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/badmaash_company_full_film.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/how_many_calories_are_in_a_jersey_mikes_sub.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/verizon_fios_login_screen.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_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 5144 bytes
SHA-256: 978c516f454cec514b4dfe881d93386af6d06786d82daa5c776c23e3f2e54cef
font_01_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 10596 bytes
SHA-256: e0f5d2b47034af9bca8969d45b43874f02128ed37969c6a2afd9fbac299c9984

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