Malicious PDF — malware analysis report

Static analysis result for SHA-256 33571be0ca523fee…

MALICIOUS

PDF

77.1 KB Created: 2021-03-18 03:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02c512a61ab941f637e4b098a675630a SHA-1: 3f277702b42c31aa741af5e5e98850437393a216 SHA-256: 33571be0ca523feea6179d8137ca1978250f01af037f179664a14dc3def6f299
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://vilenefex.ru/wix?keyword=miss+usa+stupid+answer+2012 PDF link annotation
    • https://cdn.sqhk.co/motuwezelu/tQjcGjj/al_seyassah_newspaper_kuwait.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fd8dc215bf3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_6026f752a0de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_602ef262e73e3.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/digjaWH/82078545757.pdfIn PDF document text
    • http://xunibilomo.22web.org/81549533480.pdfIn PDF document text
    • http://noxopadorilu.iblogger.org/62991738748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448558/normal_5ff27c355223f.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/hhicjed/transfer_companion_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_605024da680ee.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/c8Gvbjf/dubekifufasajaxifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_6008970a962e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5fe6478644e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/ghbAIjh/33917489016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6038693ed13a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5fc7ed9f6f03f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_5fce633bd3e17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wexugemo.epizy.com/barcelona_last_match_video.pdfIn PDF document text
    • http://tebalakafepikob.rf.gd/10748777308.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/25400816759.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/what_you_pawn_i_will_redeem_summary.pdfIn PDF document text
    • http://bulekixor.epizy.com/bamimimomuvokomegebu.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/17006148586.pdfIn PDF document text
    • http://wijagukibe.epizy.com/sobre_behaviorismo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/an_analysis_of_company_performance_using_dupont.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/vumirafapowaboju.pdfIn PDF document text
    • http://banitazivi.epizy.com/chrome_software_removal_tool.pdfIn PDF document text
    • http://finofinaz.epizy.com/eventide_h9000_presets.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_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 5344 bytes
SHA-256: ecc54c7fce8463b698b111cf0eb9bc13ae7d4e96e802acc41eff87907625d847
font_01_sfnt_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 11400 bytes
SHA-256: 7bc28a8b6255249300cc81a863c3942177540c00ee6087c32692eea86be9533d

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