Malicious PDF — malware analysis report

Static analysis result for SHA-256 5203eff9d582cd0c…

MALICIOUS

PDF

76.2 KB Created: 2021-04-30 10:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d984e7aa7a5b6d3252dedfc21aafe67a SHA-1: 57c6da3670d3738405220f53b6a501f096a99217 SHA-256: 5203eff9d582cd0c45448f6ff6d5c782d96d9fe1c7bc40fd12f8863848f80dff
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable hosting or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to camera setup, suggesting a lure to entice users to click the embedded links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+set+up+primos+proof+camera In PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/polalexevozej_movosu_kogadulu.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/talelunosanekevewuvi.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/amazing_love_how_can_it_be_chords.pdfIn PDF document text
    • http://whalesqpa.fun/bed_bug_report_columbus_ohio_hotelshaguj.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/soxoxotuxoraknsew.pdfIn PDF document text
    • http://bukawavado.medianewsonline.com/cara_bikin_cv_format.pdfIn PDF document text
    • http://ag-management.space/white_chicks_free_onlinevt8h0.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/piwevesuwofutujit.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/T0Rihgh/jiwelugaxubomewu.pdfIn PDF document text
    • http://kneeksi.ru/fetegeguveodcif.pdfIn PDF document text
    • http://shoop-fk.ru/kenmore_elite_washing_machine_repair_manual9l5sr.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/tnIijdR/gapuwafig.pdfIn PDF document text
    • https://cdn.sqhk.co/waganozusi/tB9ghLH/parent_pocket_chart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimunumiwu.epizy.com/92449615723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8b0447-acc2-40b9-be7b-514e9fac1be0/safety_data_sheet_for_mean_green.pdfIn PDF document text
    • http://pokogasojogev.epizy.com/bsc_agriculture_5th_semester_syllabus.pdfIn PDF document text
    • http://gegenig.epizy.com/how_long_should_i_prepare_for_pmp.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/20600037600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7076f42a-f0b1-493b-b4d2-ce59351ebc2e/vuzamijekeli.pdfIn PDF document text
    • http://jofanemapax.epizy.com/wine_enthusiast_silent_32-bottle_dual-zone_wine_cooler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ade1253-2a13-4328-b2df-1ce82d157323/wokatowugifin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74eae840-260a-4803-aff1-8d1b72cb0b70/how_many_hours_does_an_onan_gas_generator_last.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_off0000ec43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 5184 bytes
SHA-256: 66f45a04ff5a2e53fca6b09ea90c97dc4f468520c5e365d378d04441fbd4d574
font_01_sfnt_off0000fdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDE 10488 bytes
SHA-256: b53f6550db3c2b9e904876b32a0fe9c33f6d3c58130b1d974fd51bab34c296f2