Malicious PDF — malware analysis report

Static analysis result for SHA-256 a208b8cb97fbdcc7…

MALICIOUS

PDF

124.2 KB Created: 2021-03-30 09:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f5f6ffe8dce9d93abf89819d7c03d3be SHA-1: b1d5c11c1e9170d83a25d1ef3c5a1ed708c3acbf SHA-256: a208b8cb97fbdcc7dd58727c012a3e4b37fb66213598896e2f8035e997322a84
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 0.9998

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://fokemale.ru/wix?keyword=anthony+ray+stark+grave+wow PDF link annotation
    • https://fusarutuzazeni.weebly.com/uploads/1/3/5/3/135346017/xalil.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/ZEkjcru/zibaf.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/iedhfje/fuginuwilezila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_60527d356f020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_604fa1efea7e1.pdfIn PDF document text
    • https://xisidugaboker.weebly.com/uploads/1/3/4/4/134436298/7758018.pdfIn PDF document text
    • https://tujarabevazedi.weebly.com/uploads/1/3/4/2/134235746/gafuvupezobov.pdfIn PDF document text
    • https://cdn.sqhk.co/milimewaj/wBhdGqJ/whatsapp_apk_for_windows_10.pdfIn PDF document text
    • http://beweroxaku.66ghz.com/como_ocorre_a_formao_de_um_cromossomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_6037975ea5bd1.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/b5b2b6893.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/ANKdhf0/barbecue_sauce_for_chicken_and_ribs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_605f407fafa32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magelul.epizy.com/wedding_budget_template_numbers.pdfIn PDF document text
    • http://zezopuvezo.rf.gd/python_programming_tutorial.pdfIn PDF document text
    • http://sobakijej.rf.gd/darton_primary_school_ofsted_report.pdfIn PDF document text
    • http://ribigilubawedom.rf.gd/lasejevanejo.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_off0001aa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA4A 5220 bytes
SHA-256: 24d620b8693c80202c02f5381dec0d2e4fecaf200e18ce8c803ff043553d801e
font_01_sfnt_off0001bc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC25 11712 bytes
SHA-256: 05c0f2a6b6cd0c763ceb489acc75348b7af43b7c995d16ab87d63d54d1c642b5

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