Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cba3568ff5b8b61…

MALICIOUS

PDF

75.6 KB Created: 2021-05-19 04:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6b7054994e2853e8483df4429c18e9ed SHA-1: 3c9cc3cf2f2b6f46013a27da0778aa895d344eeb SHA-256: 4cba3568ff5b8b612e7cc21fb55eaa991fedb1b553912f2abbfa25a711d754ee
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, with one pointing to 'dugedepap.ru' and another to a PDF hosted on 'weebly.com'. The presence of a PDF link farm suggests an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted, but the structure and embedded URLs indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=%25D0%25BF%25D0%25BE+%25D1%2586%25D0%25B5%25D0%25BB%25D0%25B8+%25D0%25B2%25D1%258B%25D1%2581%25D0%25BA%25D0%25B0%25D0%25B7%25D1%258B%25D0%25B2%25D0%25B0%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25BF%25D1%2580%25D0%25B5%25D0%25B4%25D0%25BB%25D0%25BE%25D0%25B6%25D0%25B5%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25B1%25D1%258B%25D0%25B2%25D0%25B0%25D1%258E%25D1%2582+%25D0%25BA%25D0%25B0%25D0%25BA%25D0%25B8%25D0%25B5 PDF link annotation
    • https://firulozide.weebly.com/uploads/1/3/0/7/130775295/0d339e88b97a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5ff24071c8003.pdfIn PDF document text
    • https://wegudogixudefup.weebly.com/uploads/1/3/1/4/131438345/vuvabanapabiveginuwa.pdfIn PDF document text
    • https://wozibasibif.weebly.com/uploads/1/3/4/8/134868806/xesorev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_604b4797378aa.pdfIn PDF document text
    • https://kakabotosor.weebly.com/uploads/1/3/0/7/130775724/e7737fdad4611ec.pdfIn PDF document text
    • https://talebizipuvi.weebly.com/uploads/1/3/1/4/131483067/b3933fb.pdfIn PDF document text
    • https://rirokenu.weebly.com/uploads/1/3/5/3/135349909/1a672b020.pdfIn PDF document text
    • https://xikagarema.weebly.com/uploads/1/3/4/4/134489929/fomopesa_vowisij_biziboxexok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_604548196318a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxunaf/80661743093.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/probation_reporting_center_ramsey_county.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/44242225741.pdfIn PDF document text
    • http://dezusuratadaf.rf.gd/boxiwexugamixewis.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/77148298638.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/latest_version_of_whatsapp_plus.pdfIn PDF document text
    • http://daponub.epizy.com/glaucoma_treatment_guidelines_australia.pdfIn PDF document text
    • http://sawopirorafo.rf.gd/catalogo_ngk_iridium.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/spring_feign_vs_resttemplate.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/asp.net_tutorials_teacher.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_off0000d99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99F 6292 bytes
SHA-256: 317a50af72369903111b913ef86b9328e961ffd77349c7ae400567bd4187157b
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 15212 bytes
SHA-256: eaaf9bae6c7250a051f81a0edab86eeabca0c39fa122e657be3e49220ce36902

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