Malicious PDF — malware analysis report

Static analysis result for SHA-256 df46920b528b943d…

MALICIOUS

PDF

77.2 KB Created: 2021-04-28 08:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c245e8232e071dcc4a16908a1e30fe08 SHA-1: 5e43473505f25e65604fb3f77a3f7e29c13c3ffa SHA-256: df46920b528b943db89dbe038cc0208fe2d64a20bd3364d293f1fdfbefff9f0d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The primary URL, 'https://gimoguvi.ru/strik?utm_term=how+to+reset+petsafe+wireless+pet+containment+system', suggests a lure related to pet containment systems, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the extensive link farm and phishing heuristics indicate a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=how+to+reset+petsafe+wireless+pet+containment+system PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459058/normal_60317da841674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5ff4c1a668308.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/egglhj3/nubinapire.pdfIn PDF document text
    • https://fedofiri.weebly.com/uploads/1/3/2/6/132681193/maxovuxibes_mejox_soden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_604b3c7fb6313.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/bululu_welik_jekevikul_japazifamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_600aa04d8c20a.pdfIn PDF document text
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/xizusozeg-defigi-mamiwezij.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/4a8c32e1f4fe8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5fdc076a7d30f.pdfIn PDF document text
    • https://dowozazufexu.weebly.com/uploads/1/3/4/6/134606261/9916880.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/mgflhi7/24217198162.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/jYFgcha/lufifebiwajulawulutoxal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6552665f-f3ce-4070-9f47-7b493df4570a.filesusr.com/ugd/3d88c7_a871be228d4946a69ece784bcdee831d.pdf?index=trueIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_763dbcdca13c44e7885105344752d381.pdf?index=trueIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_e974e71d0bf04cadb330a85eca99e998.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/danby_dishwasher_ddw1802w_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/9324639033.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/how_much_does_it_cost_to_get_a_dog_license_in_michigan.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_948d7c87af3942d190e26cbdb5b288c5.pdf?index=trueIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_ca7660a5fcc0471b8194282c0afada55.pdf?index=trueIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_f3dee55d5f3f40928b4fd402dd4f8773.pdf?index=trueIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_b99ba4578a224408a783d206a68b90c3.pdf?index=trueIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_ccb7fabbe4f74de7a75b344b97e4193b.pdf?index=trueIn 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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5316 bytes
SHA-256: 3cac455c81736a7780846d44bc4c20291ec6d61a323df9f1c6ba834f8b07d1db
font_01_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 11040 bytes
SHA-256: dcc889b98a869b38ed243875bb74e42b7dec6ee86de599f324e30b84e53cdbf6

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