Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a651f65ab717ba3…

MALICIOUS

PDF

76.3 KB Created: 2021-09-13 03:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 23909bc5faa4521cd1c6548d661aaba6 SHA-1: 66190fa351c6a089ab7f38c8c7a9f938e2aeb035 SHA-256: 5a651f65ab717ba3e2d7dcdbb8ab9d002e548bc309f001737555c726dc4f42a5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect users to phishing sites. The PDF structure and the presence of external URIs indicate it's likely part of a phishing campaign, possibly using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=best+player+for+firestick+2020 PDF link annotation
    • http://worldprint.su/userfiles/file/9680519707.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/fibaguripig.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/34962721212.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/18006729150.pdfIn PDF document text
    • http://vector-food.pl/userfiles/file/58242143669.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/gogokenipogo.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/dekuxisozedi.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/91197033435.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/befixinalolejafep.pdfIn PDF document text
    • http://budropol.de/Upload/file/mupadijutuxanoziwobi.pdfIn PDF document text
    • http://esistore.be/userfiles/file/6667567333.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021912431544532.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/pevidapuxis.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/37578548446.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/46026499996.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313bb632a82---80867669149.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/85253408459.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/jizopopewavup.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/vaxonefolumibalavep.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/megepakivefobubepojonub.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/86380759154.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/wijovototajazowoninukuna.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/fipasaxupumuropeboxibox.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_off0000c5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BD 17224 bytes
SHA-256: efac914fad8f5ef8565d75375e6afaf98c413debe24e2b0616e1e595a4207a87
font_01_sfnt_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 10872 bytes
SHA-256: 64815d6ece1520eba160f8c84bb85e230c7f80e4566d0c000209a966419362fe

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