Malicious PDF — malware analysis report

Static analysis result for SHA-256 24dc40e78ec66386…

MALICIOUS

PDF

72.4 KB Created: 2021-03-27 17:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ef20e025f892be8a07d54fd5c3307d7 SHA-1: 593ae096ba6719c61d04787c0cd8836e771aa111 SHA-256: 24dc40e78ec663862f1cf9888e452f402e3b6ecbb587f215f684e25bf332c204
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://jacksth.ru/123?utm_term=android+linux+kernel+config PDF link annotation
    • http://rowowevu.mypressonline.com/gekoratuvesotubugebukaji.pdfIn PDF document text
    • http://sijibufaw.iblogger.org/tupemowasafiwepalerigaki.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/zofoxemiw.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/28107101338.pdfIn PDF document text
    • http://gimudal.iblogger.org/concierto_aranjuez_violin.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/76510612063.pdfIn PDF document text
    • https://kemipopebu.weebly.com/uploads/1/3/4/5/134585234/2254055.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453332/normal_5ff2d7739f039.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/fevoxaxoketegurosaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ffe88cee3294.pdfIn PDF document text
    • https://pirivelel.weebly.com/uploads/1/3/4/5/134505874/9364158.pdfIn PDF document text
    • https://xesevurodat.weebly.com/uploads/1/3/0/9/130968943/1906095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_601de7e92623e.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/fender_mustang_gtx100_digital_modeling_combo_amplifier.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/xezixuw.pdfIn PDF document text
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/5509080.pdfIn PDF document text
    • http://tafiwon.mywebcommunity.org/53758554977.pdfIn PDF document text
    • http://kujedepis.22web.org/oceanic_pro_plus_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karababeso.rf.gd/que_medios_de_comunicacion_existen_en_internet.pdfIn PDF document text
    • http://fadojogepu.epizy.com/29457167249.pdfIn PDF document text
    • http://somifisuvukibuk.onlinewebshop.net/brahmanda_purana_in_english.pdfIn PDF document text
    • http://baxaroju.epizy.com/83462255871.pdfIn PDF document text
    • http://fetewuzapozoza.rf.gd/binomial_probability_questions_and_answers.pdfIn PDF document text
    • http://konimeva.rf.gd/32386706182.pdfIn PDF document text
    • http://muvabeso.epizy.com/filakamoxadabatajiga.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_off0000de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE22 4924 bytes
SHA-256: 36d6e7027ee618c200547b114af93fa2eddd26a4fc80246a7b5ca733d49709c2
font_01_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 10968 bytes
SHA-256: 38adb72c51eee630fc9918d4036e6b207ee69936414679cf868a8ef0bb8245b1

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