Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fde26930471f846…

MALICIOUS

PDF

75.7 KB Created: 2021-03-17 04:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: beed66cb2b70b717302ff51d13fc147d SHA-1: 9282d66c8d2a8d04f39b80d855de059ad13d9d98 SHA-256: 5fde26930471f846a6f66cd1d14f4b668d8bb84eddd40ac2ff375c11c156b8fb
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 0.9991

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://jumiwimov.ru/strik?utm_term=should+you+turn+your+hobby+into+a+career PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393020/normal_600ccac7ed536.pdfIn PDF document text
    • http://gomunawuwox.22web.org/24835169581.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/dhe1iib/mimaxobukifekifefafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499935/normal_600c02ace52cf.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/fLgjwhj/5503738956.pdfIn PDF document text
    • http://tatabumilik.iblogger.org/pefagaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_60267e67554af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_601f2be2479de.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/rdhiRjj/dunkin_donuts_nutrition_pumpkin_muffin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_6015de0853c28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobexegedun.epizy.com/60703080387.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_d824cd2641f747eab8b1c6ff7e37fad2.pdf?index=trueIn PDF document text
    • http://jizuwugi.rf.gd/eclipse_juno_java_decompiler_plugin.pdfIn PDF document text
    • http://numadipabep.epizy.com/lithonia_dsx2_spec_sheet.pdfIn PDF document text
    • http://sadefevofog.epizy.com/python_data_science_handbook_source_code.pdfIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_310cdc9df91a42f0a943fb9ba14bd93b.pdf?index=trueIn PDF document text
    • https://da4cb982-96ac-4827-b01c-1601b1c9977c.filesusr.com/ugd/b05c40_c81ae74494694fbead07344244b69d78.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_68e62e3eedf647f4810bec44bf58f5c3.pdf?index=trueIn PDF document text
    • http://romolote.rf.gd/the_actor_s_nightmare_script.pdfIn PDF document text
    • http://podapuleleg.epizy.com/chomsky_normal_form_exercises.pdfIn PDF document text
    • http://robebiwasufilu.epizy.com/lesububituzujum.pdfIn PDF document text
    • http://tudafaketewud.rf.gd/beekeeping_free_download.pdfIn PDF document text
    • http://nusilelopalal.epizy.com/torulig.pdfIn PDF document text
    • http://jigufabusu.epizy.com/bidadipoparuro.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_off0000ea92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA92 5196 bytes
SHA-256: c3a4dc6ad038a27b6983cffa144503b5fa1a71dd82e581ec9681725be9eab7ee
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 10720 bytes
SHA-256: 2c9d8ebf7f4dba706a89555ba42c556ee6f537da06d75e7575520108a3f63db9

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