Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b808bad5877904…

MALICIOUS

PDF

78.1 KB Created: 2021-04-07 15:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49286e0cb25c52da902aa6bf88cbf8a4 SHA-1: 6846bd5267b4f61ca38bbc7e3e762bc4e3325b72 SHA-256: 95b808bad5877904ca8a32dc0c8e480d2d719afe70997100a4f8ce3f2befdaed
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern designed to redirect users to potentially harmful sites.

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://jumiwimov.ru/strik?utm_term=bushnell+scout+1000+arc+laser+rangefinder+manual
    • http://linefesejewug.sportsontheweb.net/nejemitubudo.pdf
    • http://lezapogogaz.iblogger.org/fumelidafupiwoxusis.pdf
    • http://tigibisolefora.mygamesonline.org/boletin_informativo_de_deportes.pdf
    • http://sovolox.getenjoyment.net/what_are_news_values_and_why_are_they_important.pdf
    • https://cdn.sqhk.co/loxowopiv/AiijcIC/geometry_dash_subzero_full_version_scratch.pdf
    • https://cdn-cms.f-static.net/uploads/4379732/normal_60311f4d81514.pdf
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5fd7ceaeab191.pdf
    • http://fudetigupapafa.22web.org/kejut.pdf
    • https://cdn-cms.f-static.net/uploads/4487416/normal_600fb3578628e.pdf
    • http://duzusedolatepe.mypressonline.com/why_doesnt_my_comcast_cable_box_work.pdf
    • http://razagewodun.iblogger.org/ansiolitico_definicion.pdf
    • https://cdn.sqhk.co/muzolorakow/gaBqvzc/bavumemunuwuxikoxiwiro.pdf
    • http://ledoxune.22web.org/which_of_the_following_accounts_would_be_included_in_a_post-closing_trial_balance_chegg.pdf
    • http://gevenukodujojov.getenjoyment.net/tutorial_camtasia_studio_8_bahasa_indonesia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bipibalixezesat.epizy.com/vuzakedunaxezolikepoto.pdf
    • https://uploads.strikinglycdn.com/files/1f847c84-1ae5-4de2-b3ba-47ea5bf5d4a6/77263649807.pdf
    • http://gonapubofolok.epizy.com/kunavovewibisurakawomuxo.pdf
    • http://gilemexuwef.epizy.com/historia_infantil_sobre_alimentao_saudavel.pdf
    • https://uploads.strikinglycdn.com/files/b7d6a2aa-224c-4c61-b18c-123e3d6eef37/who_is_the_most_influential_person_in_your_life.pdf
    • http://mewuxugeje.epizy.com/calderas_acuotubulares_y_pirotubulares.pdf
    • http://mafofeguf.epizy.com/free_punctuation_practice_sheets.pdf
    • http://wepesubotivirel.epizy.com/surediju.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_off0000eed9.bin
15eee040f976b01a39b98d631efe1a6c60abdc8f1fbb1f3ce20adde6e6522a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 5680 bytes
font_01_sfnt_off00010203.bin
99cd06b51e7ac393ae4df88f3836f52e15366bfeaff236d01c2ecac4ff82051b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 11604 bytes

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