Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad0415b25ea0cb6…

MALICIOUS

PDF

82.7 KB Created: 2021-03-07 15:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 274d27d4fc7d389a1ecfd322efcf5999 SHA-1: 5f4d88142b38e51cd11a5eff98d6a3a6b53d422c SHA-256: 1ad0415b25ea0cb66e72e4a8c03969d06d17cd7a75e737f3ec3bb2a046ac984d
126 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/123?utm_term=how+much+do+inversion+tables+weigh PDF link annotation
    • http://jigikujed.scienceontheweb.net/11273320659.pdfIn PDF document text
    • https://jufoximivovanad.weebly.com/uploads/1/3/4/0/134013024/tubobozipukuwadowex.pdfIn PDF document text
    • http://vitalia-transports.com/zojavezesavavusariramipot67yrr.pdfIn PDF document text
    • http://istlan.space/3823108354146k9q.pdfIn PDF document text
    • http://1xbet-registr.site/909537306773f28u.pdfIn PDF document text
    • http://fruitslope.online/fojubemuligiroxuf7q571.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/36364928105.pdfIn PDF document text
    • https://kazimiposaduvab.weebly.com/uploads/1/3/1/1/131163956/wodelibudurev_xelasowudepe_rovibopifaji.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/zipemavidimuwoxifuxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_4a1673617ab04fd3a64d061a99436f37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aad4edb-24bc-4238-92df-c48d1887a463/kinh_thnh_cu_c_tin_lnh.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/zaniderapajinivowepilozib.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/mdr_zx770bn_pairing.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/aamirror_apk_github.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/christmas_worksheets_for_kindergarten_pinterest.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/architecture_cv_template_psd.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_6ade618da0ed40328d003802626f1c49.pdf?index=trueIn PDF document text
    • http://sinusisokopex.atwebpages.com/who_owns_lawn_boy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8463a232-1af6-40f9-944f-8818871c70df/fijelomevexapub.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/64652050219.pdfIn PDF document text
    • http://nebojemesiwi.atwebpages.com/memolagujuvorodoxumem.pdfIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_ab152adf2dd74c0b93ab45776da8f589.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0bcdf48-c768-4ad9-a57e-f266686c6c59/buzukanofaxoxotafuwuki.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10467 5608 bytes
SHA-256: bcde5ffddf1f7a80670b76dc814387ab9d8785a20e64e4e0cb3d6db5049d1ba0
font_01_sfnt_off0001175e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175E 11652 bytes
SHA-256: 77f4a805de90892508bbac8c556b146b48acbee76824ab84dfa4cbd54169587d

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