Malicious PDF — malware analysis report

Static analysis result for SHA-256 a209d0d2e560d567…

MALICIOUS

PDF

81.2 KB Created: 2021-03-19 16:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fde78019b28414a50b7fba19ad2d112b SHA-1: dbd8282663bbb963408cd38cfff223d1ee33487e SHA-256: a209d0d2e560d567552e5dc3eac01fc151dcd807c32f3a78c8aae590e273aeeb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to obscure domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://bologen.ru/123?utm_term=apache+tomcat+9+installation+guide PDF link annotation
    • http://center-about.com/high_standard_h-d_military_serial_numbersmbety.pdfIn PDF document text
    • http://circus.market/mobile_application_project_manager_resumee49za.pdfIn PDF document text
    • https://kuwomodelinero.weebly.com/uploads/1/3/0/7/130776449/4112912.pdfIn PDF document text
    • http://hookup157.fun/simple_kingdom_hearts_tattoo3xroa.pdfIn PDF document text
    • https://beveroseve.weebly.com/uploads/1/3/5/3/135316004/4478837.pdfIn PDF document text
    • http://remont-pc.website/cv_builder_freekv5rp.pdfIn PDF document text
    • https://falesejus.weebly.com/uploads/1/3/1/4/131483218/9465131.pdfIn PDF document text
    • http://ubzvp.com/90580359605mh3vh.pdfIn PDF document text
    • https://mulafixi.weebly.com/uploads/1/3/4/3/134317856/9947504.pdfIn PDF document text
    • http://guwumuwepoxujog.22web.org/vazutapabolinipiloxif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_40ae387640a74da58a4019aa4d3c2174.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9135c8-bc0e-419d-bc07-e4caba664181/how_to_bleed_craftsman_2_ton_floor_jack.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/finumadunibi.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/resumen_del_libro_el_pequeo_vampiro_en_peligro.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_e0bb997247064c40bba9e4c13c8c1ce0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fipijife/nursery_worksheets_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc32e10-9f53-4d18-9d1f-1b8ad7a4b7b9/swahili_to_english_dictionary_-.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/cash_flow_budget_example.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_a07c1b5b3450444b864fd9c047ec018a.pdf?index=trueIn PDF document text
    • http://koxatuvuridotit.epizy.com/kabovinibojosidu.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/87253551334.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_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 5536 bytes
SHA-256: 111a142724a527f26f19f5e3972856f4722a4a6a04c1c349fa3d92d0d486fca8
font_01_sfnt_off000105b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3D 11820 bytes
SHA-256: a63d16419a66bc48873bd589477a4898b24fccfd6d73e272acbf6798a17014e7

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