Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0ac054660dd59f…

MALICIOUS

PDF

76.9 KB Created: 2021-04-11 13:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bd11fc2987e8cd67ae446aff20d9c85a SHA-1: 7500385100df22fa02703974a3353638d1f450e4 SHA-256: 0f0ac054660dd59ffee65959cab30695e59783632694438dec7e70ba801318f7
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crophysi.ru/strik?utm_term=comprehensive+psychological+evaluation+near+me PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5fc6cd8044068.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/pojosedonewojijonap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_606b6ba1e44da.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/botitiwenajafuxotux.pdfIn PDF document text
    • http://nedavupagisezim.mygamesonline.org/22337824801.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/ine_ccna_routing_switching_workbook.pdfIn PDF document text
    • http://selowopax.22web.org/18526301456.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/microsoft_access_2016_requires_visual_basic_for_applications.pdfIn PDF document text
    • http://zuwazekanusur.mypressonline.com/korean_learning_books_free_download.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/86963844858.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanuziti.myartsonline.com/is_gta_5_going_to_be_on_ps5.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_150dc92ee28e40679e9a06adf66bba1e.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_452f315849fb445987ee364ecd3cb6d4.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_1fca930454a6471a8900dbf8485b68d6.pdf?index=trueIn PDF document text
    • http://gozuved.rf.gd/tuxujog.pdfIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_2ee08a22f5dd4bf4be6d5e5f26837258.pdf?index=trueIn PDF document text
    • http://mopoluganiniru.epizy.com/articles_on_financial_performance_analysis.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_5d5a8a9c5bf546a3ae563a9efe89d54a.pdf?index=trueIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_34ef0be17e69422c8b9e4a2346889ba1.pdf?index=trueIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_72d6401007c34fa9a0712f15970c1b5f.pdf?index=trueIn PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdfIn PDF document text
    • http://ribikusilotagod.rf.gd/bufilosevatozeligar.pdfIn PDF document text
    • http://gusutawidike.epizy.com/20853574371.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_2f0948dc47de44f29ec944f92bc4f778.pdf?index=trueIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_abe62b60a67a498a8847122f1c69327d.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_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 5416 bytes
SHA-256: 06f974b0fdb3d3836fd887b4acdafa4ac19abf8c064c2e36c4c4e7bf6cdbc3eb
font_01_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 11052 bytes
SHA-256: 748f1fa6a0f4a04705420ea406da76c91df4be42e9c025383e8ca46b9e93febe