Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4dd11372e924fb…

MALICIOUS

PDF

82.4 KB Created: 2021-04-02 08:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e382c87b129e0fb8b742486a6846034 SHA-1: 1880f0e636361f1667abf6ca586159dcea9b0f93 SHA-256: ea4dd11372e924fb10ebd1d9e3ba7dd401c05fd61229cf1c8bed814fc848e744
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one pointing to 'botokaw.ru' which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

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://botokaw.ru/award?keyword=blender+2.+79+tutorial+beginner+pdf
    • http://pakizimavom.scienceontheweb.net/main_verb_and_auxiliary_verb_worksheets.pdf
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/ligavijamapavonedup.pdf
    • http://smartcreditscore.info/tadolanejixavatidodezizu6iqcd.pdf
    • http://profaudit32.ru/leadership_theory_and_practice_8thp3bso.pdf
    • http://goods-amzon.com/jenidejalupetinururesegibmx7uv.pdf
    • http://virivuluk.getenjoyment.net/73560242220.pdf
    • http://kogovokuriboti.22web.org/business_income_manual_sponsorship.pdf
    • http://kimiter.medianewsonline.com/les_articles_contracts_ejercicios.pdf
    • http://lufafemazivug.iblogger.org/malog.pdf
    • http://reweder.site/do_night_owl_cameras_record_audioauys2.pdf
    • http://testrun.ru/lezovajoliweluwazulozyc1p.pdf
    • https://gitizurozid.weebly.com/uploads/1/3/0/7/130775734/tudebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf566e0b-c1e3-46dc-9220-c097d77f34ec/kenmore_front_load_washer_error_code_f02.pdf
    • http://fuvarijes.atwebpages.com/21996205266.pdf
    • http://zebinagapovu.epizy.com/why_can_i_not_feel_empathy.pdf
    • https://uploads.strikinglycdn.com/files/267ebc8b-077d-46b3-bf9f-9ec24c502882/mufabenikaruxageduxodej.pdf
    • http://fixadamobus.epizy.com/52791080392.pdf
    • https://uploads.strikinglycdn.com/files/652491a2-47b2-401b-acfd-ce6b535a80cf/10169409239.pdf
    • https://uploads.strikinglycdn.com/files/ae9b5ba1-5c8a-4e48-b9e1-2d7ff226714b/fitizunapodinirinuzibelog.pdf
    • https://uploads.strikinglycdn.com/files/3e227687-32b8-42a3-8264-d82cab5641ea/how_to_use_matrix_on_casio_fx-115es_plus.pdf
    • http://jirabumibami.epizy.com/dafipedibozetina.pdf
    • https://uploads.strikinglycdn.com/files/f98825d9-aa49-4157-bbe0-bf690359e0e6/zusazukizedigenirogaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102fe.bin
95ef5c7725448c261ccee5944c1392eb91db17edeb7cdf1a4a068ae3eff54291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 5620 bytes
font_01_sfnt_off00011631.bin
1466c439d11b6ef0475e65183ee02fdd68a5e9f546dc0a5a2374256e5b601322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 11072 bytes

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