Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5e2f9295852be2…

MALICIOUS

PDF

71.8 KB Created: 2021-09-30 16:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: caf37b21a9ed312615f1a5397d25a140 SHA-1: 58930f2ccf14772cae291c549ea7b8ab0b57815c SHA-256: bd5e2f9295852be23251f13ce6a43de62a3d770a30a10e6c52b14be47a325b23
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=android+keyboard+covers+text+input PDF link annotation
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/xanijuvanasagopari.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/zufid.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631526753.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/wazuberoxirugomonofil.pdfIn PDF document text
    • http://trivio.it/userfiles/files/46172666667.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/wogimemalijakazupi.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/xaxikoxefi.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/megisepimajo.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/luredurore.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/ruvoxe.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/gudijotejade.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/fogobita.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/68646473784.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/sunosefeputoso.pdfIn PDF document text
    • https://znalac.com/userfiles/file/tanawavuzuvelerure.pdfIn PDF document text
    • https://medtek.vn/storage/file/nunumunaza.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/runos.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/72926936340.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/vekutubugixol.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/ninumozavobizufufitezulu.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/gonotafiranasuruporod.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614015c78ef78---busagoverawapexifotozowi.pdfIn PDF document text
    • http://brenderup.ro/mm/file/moviropoluvolilakuv.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/52370171283.pdfIn PDF document text
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/50200956696.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB394 11056 bytes
SHA-256: 4bb34b029e4648c8523a1c1b88f463b20a995f2fd78b596f3dff431e07c9dd89
font_01_sfnt_off0000cd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 16700 bytes
SHA-256: 4d7ec7633f34274b9d9d19c1a065434ddbd1e2d900b3352cd343e78bdd270a85

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