Malicious PDF — malware analysis report

Static analysis result for SHA-256 78567c204eda9c9f…

MALICIOUS

PDF

92.3 KB Created: 2021-05-11 01:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92b673a89b9631ca6cc5c75dae717dc5 SHA-1: 130cbc5cdb95f565834188cb38d9c0b9fd0c5080 SHA-256: 78567c204eda9c9f8909edf33fbf8b28d5bdd5a13f76a4f093961e9814c7f982
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users to potentially harmful sites. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URIs indicates a likely phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=swisher+mowers+reviews
    • http://povulofi.mywebcommunity.org/duwaj.pdf
    • https://cdn-cms.f-static.net/uploads/4383132/normal_6046d2ba149d1.pdf
    • https://roxewakedenal.weebly.com/uploads/1/3/1/4/131483042/jafijovudexabo.pdf
    • http://sovolox.getenjoyment.net/95418369584.pdf
    • https://static.s123-cdn-static.com/uploads/4387567/normal_5fe3196594f8d.pdf
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/8128766.pdf
    • https://cdn-cms.f-static.net/uploads/4530151/normal_600d5614ea6a9.pdf
    • https://wetugaremuzen.weebly.com/uploads/1/3/5/2/135298520/258376.pdf
    • https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/638d1eb82d3.pdf
    • https://gonibokufelari.weebly.com/uploads/1/3/5/3/135346176/filogidasu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_297da70feac641008a2dfc1e8df6f92c.pdf?index=true
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_25319ad262d84790955fc83e5476b481.pdf?index=true
    • http://zijedan.atwebpages.com/nezoxoset.pdf
    • https://s3.amazonaws.com/teximikamukubo/elephant_in_the_living_room_movie.pdf
    • https://s3.amazonaws.com/divexikav/sijuwujawixuzomapipori.pdf
    • https://s3.amazonaws.com/robumuduluwise/puditurirekiwogivim.pdf
    • https://s3.amazonaws.com/midaguvimabof/mirro_16-quart_aluminum_pressure_cooker_canner.pdf
    • https://s3.amazonaws.com/sogovekevi/indice_de_barthel_modificado.pdf
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_9a3f707ed3f44f21b8353079452b46b3.pdf?index=true
    • https://s3.amazonaws.com/nevowimo/goxinitemaze.pdf
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_dfc3fccf4e3d46c9830387b08042ea61.pdf?index=true
    • https://s3.amazonaws.com/xotomisen/vejagulugukixutumewobejur.pdf
    • https://s3.amazonaws.com/gelawiweza/programa_de_estudio_2011_guia_para_el_maestro_secundaria_artes.pdf
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_cddfaf4e402e47c4887689201ef38a65.pdf?index=true
    • 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_off00012eb9.bin
02937c2e3cb2a189f9b80e0fe4c7feeb88323dff02c9a447240f0964aa1f714f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB9 4940 bytes
font_01_sfnt_off00013f73.bin
7430e4c351135a25e0f36d8ed9d1d02f098d9483e296ef3e41a4dff5e33c32b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F73 10800 bytes

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