Malicious PDF — malware analysis report

Static analysis result for SHA-256 020bc73b06f68fb6…

MALICIOUS

PDF

72.0 KB Created: 2021-03-11 23:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a0654cfb38afee633405163af756040f SHA-1: 54633678a6e2124c95a9d359bfd190f8d364aebe SHA-256: 020bc73b06f68fb6886b365d08722a337e487e51f7783e44528fa48be92a0674
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating attempts to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://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://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_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 5296 bytes
SHA-256: 3cde5bcb8c885e23711270afecaabb3a6415f56c297f8f31b2672e0b9cee3196
font_01_sfnt_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 10996 bytes
SHA-256: e8e799da2f2213c48a6763668a2678b5b865cbd5bf5f16eeefb798fcc27cd53e