Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2774cc7c12885c5…

MALICIOUS

PDF

79.3 KB Created: 2021-05-07 20:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d3584b464edce74231b123b652e3f9fc SHA-1: c1bb33ded1ebe982ee2a7ed540061527d9cbcf5b SHA-256: a2774cc7c12885c5270a3132119600dd15d909c3120648701dccd9dc72f4777a
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 0.9996

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://mezovuduw.ru/strik?utm_term=programming+arduino+uno+in+pure+c+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407576/normal_60345d3499473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6067270a3358b.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/brawl_stars_apk_indirsene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_604b98436a658.pdfIn PDF document text
    • http://housefashion.ru/spider_man_3_game_for_ppsspphlo41.pdfIn PDF document text
    • http://trixy-matrix.space/pibejusuguzuzeguwegovim4hlw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501229/normal_5ff027e4c7d79.pdfIn PDF document text
    • http://kaxasujigunabew.iblogger.org/screen_brightness_control_app_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5fe8f599b0e91.pdfIn PDF document text
    • http://agent-spv.space/bujevhlh9m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruditofejew.rf.gd/finida.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/31007090123.pdfIn PDF document text
    • http://muresapidun.epizy.com/factory_reset_android_lg_phone.pdfIn PDF document text
    • http://wafibajew.epizy.com/netflix_for_android_tv_apk_mirror.pdfIn PDF document text
    • http://gejamuromina.rf.gd/zezadetubobazada.pdfIn PDF document text
    • http://zusutifosaj.rf.gd/phenolic_compound_biochemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/koveraviweseka.pdfIn PDF document text
    • http://naremijex.epizy.com/redumudokoxavaw.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/digital_marketing_plan_template_smart_insights.pdfIn PDF document text
    • http://podozedomusajor.epizy.com/75719103757.pdfIn PDF document text
    • http://viladanus.epizy.com/akreditasi_rumah_sakit.pdfIn PDF document text
    • http://tapoxufu.epizy.com/vunikajilozovoz.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_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 5268 bytes
SHA-256: 049e9dad29fc9299c66c5a87e35efc8bc6823a734cecb84095c6a7cea28bcd13
font_01_sfnt_off00010799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10799 11656 bytes
SHA-256: c92385e19551cc6001bbe109e9d904fd0eaea088dc475c8c41516a025becacca

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