Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5f88dc0a56b66a…

MALICIOUS

PDF

76.9 KB Created: 2021-03-14 03:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 822732b3ca38daaa974c7c23d952467c SHA-1: d371b0a400a88aad9265f30cbb843e662b72dc5e SHA-256: 5a5f88dc0a56b66a07bd540a6953c64d15a6dbd6f0a378a6e62c219f9f11b5f3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary one pointing to 'leonvi.ru', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, appears to be a lure related to internet service provider modems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=best+dsl+modem+for+centurylink PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387921/normal_5ff482db42547.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/rikujolegemolerekijigigo.pdfIn PDF document text
    • http://vebenuzan.22web.org/api_staph_biomerieux.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/dovopi.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/14602691027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_60134b05ee9bc.pdfIn PDF document text
    • http://lakulikelanu.iblogger.org/audit_procedures_for_cash.pdfIn PDF document text
    • http://kugibut.22web.org/materi_pelajaran_akuntansi_dasar.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/the_golden_goblet_online_free.pdfIn PDF document text
    • http://mimisijuz.mypressonline.com/pdf_attachment_in_mail_merge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_600d902c7be3e.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/who_is_the_boy_who_harnessed_the_wind_based_on.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/titobapesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sasumejexijow.rf.gd/77945686285.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_bddc744177054dc28a931fa0150ec98c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/81514655541.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_6055568bca53482f977a5349f913e929.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_68d2f22d95c247d3becebe362bd97ad7.pdf?index=trueIn PDF document text
    • http://wovibojo.onlinewebshop.net/49779317751.pdfIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_c5bf18c07a2d4d08ac9472baa72a2bee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mavixu/7463969722.pdfIn PDF document text
    • http://solarujarinobo.myartsonline.com/a_witches_bible_read_online.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 5172 bytes
SHA-256: 9d5b04416b59c85fb0f8fcc60bdf92ac6b8127aa7b7515ccf3eeba178ca9a27a
font_01_sfnt_off0000ffde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDE 11232 bytes
SHA-256: f916aa48eefb44a0091d6a7bdcf429d19aaed3b0e95431073fc429da6b0b34fc

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