Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1bccda0e0925ea…

MALICIOUS

PDF

76.0 KB Created: 2021-05-06 23:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3258362b8f92945ff9fa7637bf89f84e SHA-1: 86b9ed31a35d546a0629593167864494e7f81378 SHA-256: 9d1bccda0e0925eaf571f6909c079215c9dfe468a06f16fdf42fb9ef20efce54
126 Risk Score

Malware Insights

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

The PDF document contains a lure related to resetting a Maytag washer, which is highly suspicious given the file's malicious verdict and ML classification. It embeds numerous external URIs, with a primary one pointing to 'maypoin.ru', suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+to+reset+maytag+4000+series+washer PDF link annotation
    • https://pikulevixabokof.weebly.com/uploads/1/3/1/6/131606248/ee7c84761e8bd0.pdfIn PDF document text
    • https://cdn.sqhk.co/gekakisoduvo/psgjEii/tropico_6_switch_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/jgfgdgj/used_dragy_for_sale.pdfIn PDF document text
    • http://fefikaniki.22web.org/fabadobowibij.pdfIn PDF document text
    • http://bestsalestoday.xyz/nudizozogonixileropivizeyzvpx.pdfIn PDF document text
    • http://vinorama.fun/gujugerifofudixurrgph.pdfIn PDF document text
    • http://timecodes.net/jasukiweruleputamiraronexizod7.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/baxenotanedebozul.pdfIn PDF document text
    • http://thrivewebs.com/real_car_parking_simulator_car_driving_academy_games0aaws.pdfIn PDF document text
    • https://nonadokemiraf.weebly.com/uploads/1/3/0/9/130969568/fupimuxeva_burexiwerotomib.pdfIn PDF document text
    • http://peferiselavumi.iblogger.org/marriage_certificate_form_download_telangana.pdfIn PDF document text
    • http://btsworld.org/sintesis_de_salicilato_de_metilo03u7a.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/bknLYiR/52155028351.pdfIn PDF document text
    • http://btsworld.org/brahma_kumaris_phototedjx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasudikek/cell_cycle_and_cancer_webquest_answer_key.pdfIn PDF document text
    • http://vutaxinasiva.epizy.com/comdial_phone_label_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/the_dark_knight_script_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/53498945555.pdfIn PDF document text
    • http://mevetilozavasep.epizy.com/automatic_flight_control_system_pallet.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_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 5452 bytes
SHA-256: 017c118b5b1a371dd14ce7296d55ad42e5334c08fa847f1ccbadab9ced77249e
font_01_sfnt_off0000fb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 11492 bytes
SHA-256: aa196ed24664354d77088bb842d89392a6f73753b50343f382a8844fb95d22c9

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