Malicious PDF — malware analysis report

Static analysis result for SHA-256 083a0daba8e107a7…

MALICIOUS

PDF

89.5 KB Created: 2021-04-05 14:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5b7aadf59e1d4c32b3ec67268478ae9a SHA-1: c82c21a2f3bd5fc0423f058c57f3bca341d7cf2f SHA-256: 083a0daba8e107a74367f32f235ca6155b6e8fae3d546bf380b5550495d06bc0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary one pointing to a suspicious domain that appears to be a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=will+there+ever+be+a+dork+diaries+movie PDF link annotation
    • http://fevonijanufoweg.iblogger.org/xefadubopejetevapoda.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/736067.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/cathtrisme_urtral.pdfIn PDF document text
    • https://vaxurubezinijor.weebly.com/uploads/1/3/4/6/134690270/d379676f74c6.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/totepemuninaful_fakuwuguwiketen_vajimugodisazij_sadorixufesotu.pdfIn PDF document text
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/nibojikeki-digixuk.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/5168440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zigatikix.rf.gd/xajusuxogozusane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/556fb380-f842-45e6-afc2-7b7a84f8df25/roper_refrigerator_parts_list.pdfIn PDF document text
    • http://dapufojutujat.atwebpages.com/54366432710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e5f349-e20b-4a5d-9ca8-0e61bc5fb488/23739100050.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/29435740788.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/booklet_printing_settings.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/witebijivabasupomaxiriwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f284f91-7dd0-406a-be94-156f84e42f87/filipe.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/diarrhea_pediatric_guidelines.pdfIn PDF document text
    • http://kipenul.epizy.com/is_the_tippmann_a5_a_good_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd00b71-3681-4d41-992e-7774c9258061/20124604161.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/how_to_forecast_in_capsim.pdfIn PDF document text
    • http://jumebesatupa.epizy.com/25745688812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b13ffb-8ac8-4365-9488-2d2313430fda/horton_hears_a_who_jojo_voice_actor.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 5024 bytes
SHA-256: 8918e9a22da44774b0f0da717ffe70bd2018d8e4c5a8dc34eac2b20cd84bd0b0
font_01_sfnt_off00011208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11208 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_02_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 11312 bytes
SHA-256: e1022719c5e4a922ebc54852593016b891b0070c836ed476ff83063abf2e8c74
font_03_sfnt_off00014826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14826 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333