Malicious PDF — malware analysis report

Static analysis result for SHA-256 42413f634fbac3dd…

MALICIOUS

PDF

82.5 KB Created: 2021-04-06 12:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 002d530c6f1b895becc717a3df5472fe SHA-1: a0015239afaba7ed698d2d042b77eac02e914e91 SHA-256: 42413f634fbac3dd865d6b13fbbeeec93a30ac333acb02eeb287197c949287d1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically phishing or trojan activity. The embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://bologen.ru/award?keyword=il+canzoniere+della+morte+pdf PDF link annotation
    • http://fibaxoxadomi.sportsontheweb.net/51381111268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_606aa39eb7185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5ffa66207ca0f.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/25374031085.pdfIn PDF document text
    • http://hurleyshamburgers.com/wikaz47uk1.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/55433828186.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/67303443741.pdfIn PDF document text
    • http://reduslim-ufficiale.website/interview_with_the_vampiredtuq5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409827/normal_6001d3a22ac8f.pdfIn PDF document text
    • http://uscreditreport2021.info/gulamujimawg6ygm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/fishing_guides_ambergris_caye_belize.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_efaf180837c041609d76e81a2ab7cb22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/what_to_do_when_your_roku_remote_is_not_working.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_46859fa704c24718bdd7a2e247359fd5.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_bb8c2d54356a420ba9b50f3f37adab57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/cbema_curve_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/gagalebuxusuzutevaw.pdfIn PDF document text
    • https://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_ad6231cf9f384857b8e59de44bc96eef.pdf?index=trueIn PDF document text
    • https://f5d5bca3-0ffd-41e3-a77d-3d805a1e43e5.filesusr.com/ugd/4e23ca_bc6c25675bcf48639d4edc6e0fc6c9a0.pdf?index=trueIn PDF document text
    • http://fovawipemezipu.myartsonline.com/cancer_de_colon_mexico.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_f71c93764f45434db4e2eaf8147b14ce.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_4ad656e57172473190e1dd6bd401e2ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/guide_du_routard_cuba_fnac.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_6bb956a35a81429685ae879ecbb7b6e5.pdf?index=trueIn 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_off000101e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 5108 bytes
SHA-256: a230bfd08a94fc96e858aed268af1e800253f98b08bb216b513539084fef786f
font_01_sfnt_off0001133d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133D 12020 bytes
SHA-256: e85da1a80d20b8259dd8a11488d213f2388f4e9311f620f276539e4099599d7c

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