Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a5b9a87df0e243…

MALICIOUS

PDF

78.6 KB Created: 2021-03-02 18:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4a9c977cb75b678980e8ee464680a5e1 SHA-1: 18df393cf84ee979634f45ca03b470c31f1cd1e5 SHA-256: b1a5b9a87df0e24303985849149738c4a1d98a6fb3c9ddf167e8803ac313476e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded external URLs, one of which is a direct link to a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a compromised or malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://maypoin.ru/wix?keyword=prince+of+persia+apk+download+for+pc PDF link annotation
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/gimibadapage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_6025b2aa2bd3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_6031b6e980c4d.pdfIn PDF document text
    • http://milanomodaitaly.site/15656218739gdls1.pdfIn PDF document text
    • https://javubabajekav.weebly.com/uploads/1/3/5/9/135957287/tazogakebetam-guworixavudebor-fajobovuwerof-tavazoj.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/5A2idig/80009204805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5fc8d99bb4e44.pdfIn PDF document text
    • http://uscarins.info/how_to_clean_cuisinart_thermal_coffee_carafew3h76.pdfIn PDF document text
    • https://sozamevojor.weebly.com/uploads/1/3/5/3/135309273/7634775.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/fiwonovizexoseru.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/geFheid/occupations_and_professions_exercises.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476590/normal_603874b3562be.pdfIn PDF document text
    • http://ranking-se.com/kafesabugogamaluzalonu3r3u1.pdfIn PDF document text
    • http://nasporte1.fun/95460020335qb6nh.pdfIn PDF document text
    • https://fodubimofo.weebly.com/uploads/1/3/4/8/134884763/takitexejuk.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/fhb7gfK/23583114255.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/fadobirak/subway_oven_roasted_chicken_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/injury_report_browns_rams.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/27382255433.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/auntie_tay_mickey_ears_template.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/jugixewe.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/227421076.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_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 5308 bytes
SHA-256: ebf97ed41312b4d985d673d7e565208b406e2f90f85b16a906b1b3d65fbf4f75
font_01_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 10136 bytes
SHA-256: dea655e9e8ba990d394477e90849fe1e29a681bd6fe63db3fa092b1c80a52cb5

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