Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d58508551f071b8…

MALICIOUS

PDF

79.2 KB Created: 2021-04-18 00:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fe33e604900f819dbc43374e538a372e SHA-1: 9aea2936fb5f198f3932931f8b1ee24951e8a965 SHA-256: 0d58508551f071b8c23f6c9989983b3cf9bfd2c82680c135de1bdda662f44c94
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains and configured with UTM parameters, suggesting a phishing or malware distribution campaign. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://ponafet.ru/strik?utm_term=2008+jeep+grand+cherokee+overland PDF link annotation
    • https://cdn.sqhk.co/bovefonot/jdRheby/26465584538.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/55916197299.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/oStITuO/naming_aliphatic_and_aromatic_hydrocarbons_worksheet.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/jurnal_preparat_apus_darah.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/O6kjgii/dragon_d2_goggle_replacement_lens.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_604d83f147284.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/66867166239.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/49290174148.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/eNYjfhe/41657192777.pdfIn PDF document text
    • http://vutunema.mypressonline.com/yamaha_htr-4065_manual_cz.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/didXheY/kejibuxonurosoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_603fb7f4c9cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5fe9ec2fa1b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5fdb1888851c9.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/central_limit_theorem_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5fe1ab822108a.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/brain_teasers_questions_and_answers.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/bhagavad_gita_book_in_bengali_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuputes.atwebpages.com/11427592482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82dc201d-5d72-423e-b17b-dc0f71160435/42040208771.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/new_dj_songs_telugu_2019_wapwon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d183f0d-c47d-453c-86c4-f1ec65bf841b/vapoligumubaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/biology_12th_class_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/lagu_camelia_malik_feat_rhoma_irama.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/tifirutisajodizamumojor.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/zuvurevidomowabulepumoge.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/sobaruponojixi.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_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 5728 bytes
SHA-256: 520d1ae818d1eaa987d3c0af2c0ca508b94e8c7226e49d677a057fdab397b54e
font_01_sfnt_off00010ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC7 10520 bytes
SHA-256: f0731b7e17b907a7793ae1c7a8ca6c22122874914133291b6b6b0a4ee9849128