Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d50937e8389b55c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-07 12:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c40e6c856b1fd77037161c148258f06d SHA-1: d4bed9a0ffe2a6b6b7502a03115b8cbff7fb0294 SHA-256: 1d50937e8389b55cd303115ed0d801740853cf8d09448fe52a44f4260adaf2f0
196 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a mass of external links, including one to 'http://loginwithfb.site/wesepovapowonaluwuz94sz5.pdf', suggesting an attempt to redirect users to malicious sites. The presence of numerous links, some of which are invisible, points towards a link farm or phishing lure strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://xajibur.ru/aws?utm_term=levene%2527s+test+for+equality+of+variances+significant
    • https://cdn.sqhk.co/tejilunuf/ggfhjgi/fetetibejorosi.pdf
    • https://cdn.sqhk.co/gujowaxexag/Fjfhghc/shop_disney_parks_masks.pdf
    • http://cadenalia.com/techcrunch_logo_assets17x38.pdf
    • http://jotitojimo.mygamesonline.org/diploma_mechanical_engineering_jobs_in_bangalore_for_freshers.pdf
    • http://carinsusa.info/aptitude_test_for_jobs7xcbg.pdf
    • https://cdn.sqhk.co/lutadamafe/hiicjhA/lowest_airfare_to_las_vegas.pdf
    • http://helplnstagramcontact6088757.com/bernina_record_830_service_manualx2lu4.pdf
    • https://cdn.sqhk.co/zururodi/Tihh7ij/vimotan.pdf
    • https://cdn.sqhk.co/jijasitov/juIjg4o/56251450622.pdf
    • https://cdn.sqhk.co/xinefegepe/iagfigE/luzuk.pdf
    • http://vumamanepu.sportsontheweb.net/8038254015.pdf
    • http://loginwithfb.site/wesepovapowonaluwuz94sz5.pdf
    • https://cdn.sqhk.co/bipuzojafa/idifWcf/infinity_insurance_near_me.pdf
    • https://cdn.sqhk.co/bulixanejad/fidjeih/play4fun_casino_mohegan_sun.pdf
    • http://gagogepatajebe.medianewsonline.com/the_tax_collector_movie_cast.pdf
    • https://cdn.sqhk.co/dixejetafap/Yihifie/kapojadum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2683dd32-8e6f-400e-953f-4d12f9e7e496/cisco_ccna_200-301_exam_cost_in_india.pdf
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_77e46c4d49e64097b8fbd7372df7cf03.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b91874be-73f9-4406-a6ea-a0431cfb7ba6/solution_set_of_quadratic_equation_calculator.pdf
    • https://uploads.strikinglycdn.com/files/de4ecff6-3afb-49b8-a1f1-d2ad6ba13d9d/lg_direct_drive_dishwasher_error_code_ae.pdf
    • http://weparaxopulo.atwebpages.com/59052754959.pdf
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_fcc2f60d773b4fbfab868a327fa75902.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8cea4c6a-8834-42de-b99f-081a65ca38e1/86471202494.pdf
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_3e6d3838bb0f4e89a4a151442a782239.pdf?index=true
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_678889336a43423ea6ec1191902c43fd.pdf?index=true
    • http://wipibefab.onlinewebshop.net/pitodatal.pdf
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_a3a08367fdca403c912634d0fdd19d33.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_off0000fb4f.bin
251eaff28590a1fa463d74e6724a957590615b9fcfb548a729d28d6b98be0ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 5312 bytes
font_01_sfnt_off00010d8c.bin
19512808524d74e6715b285d85d8f28c142813fec7fc00e7bc920f7eefa70383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8C 11092 bytes

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