Malicious PDF — malware analysis report

Static analysis result for SHA-256 25445c154c6b77a9…

MALICIOUS

PDF

75.5 KB Created: 2021-06-03 09:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0e33827b79ea04fa1e6feaef240fb8d7 SHA-1: e28d271842588bef2588d5b32486ba49e3fa84b8 SHA-256: 25445c154c6b77a9b83e5d61a531f979f5eb7a3a1c53925f5358612cbbda444e
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or scam attempt, leveraging a link farm strategy to direct users to external resources. The document body, though heavily obfuscated, contains references to 'Gta 5 32 bit rar dosyas1n1 indir', suggesting a lure for game downloads. The presence of numerous external links, many hosted on disposable domains, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://krisoc.ru/pbw?utm_term=gta+5+32+bit+rar+dosyas%25C4%25B1n%25C4%25B1+indir PDF link annotation
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/lavoxovexapikisolowi.pdfIn PDF document text
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/e118ef6.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4459774/normal_60b3208e0e441.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/nurevabe.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/rigino.pdfIn PDF document text
    • https://riledamulobav.weebly.com/uploads/1/3/0/9/130969772/viradapelatudi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383149/normal_600878df4f3ab.pdfIn PDF document text
    • https://xubivolimoba.weebly.com/uploads/1/3/0/7/130740090/2736386.pdfIn PDF document text
    • https://fiduwovizeget.weebly.com/uploads/1/3/4/5/134517619/bodizodusiwa_pevunerazu.pdfIn PDF document text
    • https://kamidosebesu.weebly.com/uploads/1/3/4/5/134593467/verat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_602d25de1cea1.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/kanodugadoli.pdfIn PDF document text
    • https://bepewosub.weebly.com/uploads/1/3/4/4/134445398/9940c.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/5acee009-f6fc-4678-9afb-4edf7ac6fe9b/22175719941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ffefd75-a8a1-46ed-8784-63cd01ad71f9/serta_motion_essentials_3_king_adjustable_base.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f033354d-ef03-40e9-84b3-28eb754ad9f6/how_much_does_fidelity_charge_to_trade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59fe492-2d33-473b-a0d5-a4261ffb00be/99781324672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77cd9704-564f-4cbc-85d7-aaf4a0925fa7/kareras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ed67ce-3134-43f4-84d5-3079e76d2a79/kudozifojarobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15618113-49fc-4aae-8969-98e4c6513877/vexalefojilakubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ebf023-d1af-48ce-8725-0966df8866ee/omb_circular_a-11_appendix_b.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_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 5512 bytes
SHA-256: 5b65cab0c9d05fd18a0d6a78405e86f63074eb10acb0c684a54a6a223ee6c16d
font_01_sfnt_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 11184 bytes
SHA-256: 3c9501f4609a513c127f3d4db05d8e6a7c6bb9701df0dd126b742b1e41b2532f