Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ba2fd3745c82aa…

MALICIOUS

PDF

80.4 KB Created: 2021-04-04 16:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dedcb86a0b762919d57f37edaf501cc8 SHA-1: a9edd791f2200111115a057854e8d0793946f697 SHA-256: f0ba2fd3745c82aa1c792a3c3292ef7a0cf7edece52d88d454ba96f692f583c5
186 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. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs and the PDF structure are indicative of an attempt to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=shark+sonic+duo+hard+floor+pads PDF link annotation
    • http://uptodate.site/q50_smart_watch_manualx06mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_6034dc738ccfd.pdfIn PDF document text
    • http://praktika-ingenieur.com/zukoselixixg2rbt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_600ece604f12e.pdfIn PDF document text
    • http://bigops.fun/percy_jackson_the_lost_hero_ebook7u8cs.pdfIn PDF document text
    • http://openchambre.xyz/rujawuworijezadejatanelzezl.pdfIn PDF document text
    • http://jobauthor.online/que_es_el_estilo_de_vida_segun_la_omsoiuzp.pdfIn PDF document text
    • http://closemaze.com/83520245262tilha.pdfIn PDF document text
    • http://kleomaften.online/64063713213owwbg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481271/normal_5ff94c470b74e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5fe7dac835c7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_603e7a32c0ef9.pdfIn PDF document text
    • http://topcreditscore.info/walmart_black_friday_days_of_deals8rutz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_6052bb4df0a74.pdfIn PDF document text
    • http://shopeuro.pro/nizawukebupigexobuvuk6mbfx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406168/normal_600b757c4d396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_6016e60c9427c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_a146c78f23ad4a62817ccf2fa0f1b48c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/745ff076-5cbd-45b5-ad97-233208fe9c13/13063986012.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_5a7a3ba4fc7041a3bc6d320d3f18dec0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/832baf26-e4b0-49fc-85be-fa459f4194b4/xanalixete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b585408-9cf4-4498-bb91-a9e7c89f69d4/67142851687.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_7627103816604b5ba412262669b44faa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38eea940-3f82-4daa-9f45-d726cc0aa490/mobiwezizugutati.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 5092 bytes
SHA-256: 5e0145ac1768a6518505e5051456995a4f329fef20374f600e80c23d428627e5
font_01_sfnt_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 11508 bytes
SHA-256: db0068cdb79d2a499b36ec92b0c53368a91bee03aad50a760e98367f19575b42
font_02_sfnt_off000125b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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