Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bfd24de0ec8694…

MALICIOUS

PDF

77.4 KB Created: 2021-02-23 08:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 392b6d10aa83124693bd2ae333932db8 SHA-1: c54ca7fbfe4b9d167360772385e675d5d8b94dca SHA-256: 69bfd24de0ec86948fdba900d195b94b63f263514c7fb50bbf83f5a7eb9f2c85
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains or use UTM parameters for tracking. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains text related to 'Casio g-shock' which appears to be a lure to attract clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=casio+g-shock+radio-controlled+solar+powered+manual PDF link annotation
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/6bee1a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_5fd7a6eb443ba.pdfIn PDF document text
    • https://cdn.sqhk.co/xomorenut/hhjbohc/tubemate_apk_download_2020_version_uptodown.pdfIn PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/nalawowomininep-fapawurago-xakulipovet.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/NUihjeq/anime_face_maker_go_pro_apk_free_download.pdfIn PDF document text
    • https://lopatitegadusi.weebly.com/uploads/1/3/5/3/135311006/698e1.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/wilugaw.pdfIn PDF document text
    • https://cdn.sqhk.co/wamedexipun/fjdDhjH/my_cloud_login_page_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/lgjhhGw/simple_business_plan_template_ppt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_6019ab02de464.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/gjr6Ujf/celestial_spanish_meaning_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411001/normal_600095aeb8f08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/wedufa.pdfIn PDF document text
    • http://darewuxopasog.rf.gd/aap_pneumonia_guidelines_2015.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/rated_r_album_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/pikitetubusezebunusibes.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/likupaxegu.pdfIn PDF document text
    • http://porumujowupof.epizy.com/bartholin_cyst_treatment_guidelines.pdfIn PDF document text
    • http://xofukadebinomo.epizy.com/the_secret_book_of_gnomes.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_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5580 bytes
SHA-256: 2495762b3ca5fbf3f5bf507dfcc56ff47c648dbaafe3edc695b8d5d9c82c82e5
font_01_sfnt_off00010584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10584 10168 bytes
SHA-256: 476cad190540bc552b79a0759188cbfc0777e953878acd04f1403731bbe869b1

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