Malicious PDF — malware analysis report

Static analysis result for SHA-256 df652db8346d5e85…

MALICIOUS

PDF

59.3 KB Created: 2021-03-11 23:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: aa40d121a872b607fe67eb983ea75dca SHA-1: a83fb1d8501d715fb3cbf1d72367a55053e46762 SHA-256: df652db8346d5e85eab99a5050c1e88bd0ee258d800c9e0b4885a23d67bad62a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the PDF as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7865

Heuristics 4

  • 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
  • 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/strik?utm_term=insinkerator+badger+100+reset PDF link annotation
    • http://fuvesozufinefi.medianewsonline.com/apgli_refund_form.pdfIn PDF document text
    • http://circus.market/how_to_unlock_hill_rom_advanta_2_bedn2w8b.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/migivasamomas.pdfIn PDF document text
    • http://ital-girl.space/the_chrysalids_audiobook_freezu0ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_6022c1e731053.pdfIn PDF document text
    • http://plusstore.pro/river_flows_in_you_virtual_piano_sheet4frb9.pdfIn PDF document text
    • http://aromaita.space/what_is_community_service_definitionbt98g.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/how_to_export_midi_tracks_from_garageband.pdfIn PDF document text
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/tititozadan.pdfIn PDF document text
    • http://steblin.pro/award_show_ae_template_freej3mko.pdfIn PDF document text
    • http://watogoda.mypressonline.com/46014077780.pdfIn PDF document text
    • http://yazansoft.com/kafufuxirkk24c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401971/normal_5ff54d9d5beb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_6040303a13447.pdfIn PDF document text
    • https://rizegenaw.weebly.com/uploads/1/3/4/1/134108854/f1b81.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/3d996f64.pdfIn PDF document text
    • http://mesretly.xyz/sagobofakukugojonitubbu18k.pdfIn PDF document text
    • https://gewifikapogesel.weebly.com/uploads/1/3/5/3/135351592/ee7dc4d4cd.pdfIn PDF document text
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/7031407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5255fb-6a01-4472-943f-ae2a90a558c8/gowalitexufat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcccd81b-1708-42e4-b3ef-a727e10caaec/32377195027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7320d200-6419-48f9-b000-8c15b1794810/lejuzawosadivetefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491d8231-e233-4ab2-aafe-30edad4fbd55/troy_bilt_self_propelled_mower_with_honda_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56286478-d5ad-4b0b-8482-e1b81f17a098/what_is_the_hardest_drum_rudiment.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 5296 bytes
SHA-256: 3cde5bcb8c885e23711270afecaabb3a6415f56c297f8f31b2672e0b9cee3196

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