Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a29ee8a7322126…

MALICIOUS

PDF

77.3 KB Created: 2021-04-16 04:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8575c711a4aa76386321214e95ec92c3 SHA-1: e9e732e61c9d4c0758384dbf03eaa4a66ffa4642 SHA-256: c7a29ee8a73221267faf6c381cdc41b653a4b3b7100a8b18a88226f53423f37f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. One prominent URL, 'https://dugedepap.ru/strik?utm_term=last+date+meaning+in+hindi', is flagged as suspicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=last+date+meaning+in+hindi PDF link annotation
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/rerusupi_nekomul_wizuwufoneloxat_zojemobakix.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/jdhPjiZ/61269666352.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/gidUbjh/bilukezubotu.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/cine_substitution_reaction.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/gf9hahe/derawiwoparuvinoregenuv.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/yamaha_mg10xu_mixer_case.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/eiheWia/solitaire_free_download_full_version_mac.pdfIn PDF document text
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/budefutomakugim_nugoke.pdfIn PDF document text
    • http://rotukefune.getenjoyment.net/biometria_hematica_unam.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/h8iihcw/supenixazusoderokejukiga.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/xixekabusaf.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/zesixefe/what_are_the_2_types_of_steering_systems.pdfIn PDF document text
    • http://furipurisebete.onlinewebshop.net/desordenes_alimenticios_en_la_adolescencia.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/anemia_falciforme_principais_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/how_to_tone_up_legs_without_losing_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/mekimilodebitad.pdfIn PDF document text
    • http://wetukanezin.atwebpages.com/nuwawoxujanamowo.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/air_force_1_womens_black_friday_sale.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/gowejujemazoxogokega.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/51488251856.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/wigonomel.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_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 5052 bytes
SHA-256: 6f8e586ff2b7a88308ef82a3ddf589741dd3bad85ae2728fb64f0899cce72500
font_01_sfnt_off0001030e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 10232 bytes
SHA-256: 90d234e612976482d639a1f6fb3f2f023e8a0a1902f7b2287c195eaccda3fa2d

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