Malicious PDF — malware analysis report

Static analysis result for SHA-256 be49acd6075e76ef…

MALICIOUS

PDF

76.6 KB Created: 2021-04-21 17:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 31a851348c401d1f03d7cf6cef93b946 SHA-1: 21a264dc6af0931dbaaff919f9aef970d62b0911 SHA-256: be49acd6075e76ef53ae5e3eb23fee007361cadf224f78c1ef32aa6e0f50731b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary malicious URL identified is https://ponafet.ru/strik?utm_term=beowulf+translation+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=beowulf+translation+pdf PDF link annotation
    • http://groshyk.site/girawupawps1.pdfIn PDF document text
    • https://kikeletiwemuk.weebly.com/uploads/1/3/4/6/134671512/1185938.pdfIn PDF document text
    • https://mifojarodileg.weebly.com/uploads/1/3/4/7/134707921/nitomokivov.pdfIn PDF document text
    • https://sikefenuvip.weebly.com/uploads/1/3/4/0/134012601/lakoz.pdfIn PDF document text
    • http://eslife.pro/is_schweser_cfa_worth_itc198y.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/pejaxum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_dc33a6d48095444da760942d0f97970b.pdf?index=trueIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/functions_of_management_files.pdfIn PDF document text
    • http://nedeponup.rf.gd/65732352844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8caaf39-506a-4254-9eb1-231c8d89271c/43167001124.pdfIn PDF document text
    • http://xupasafagimi.rf.gd/kijobul.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_209d1db175924ddaa63602be2574b734.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_8ac4028d3d2f43c7b4819bfc66c81baf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d47d71-7292-4a0f-91b5-9cef8ba57320/felogidilawuwulogidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc20e2f-a206-4c11-9e73-ccff3d8386b3/60990464958.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_ea4a946fd0d84aa6b604537a2257f87f.pdf?index=trueIn PDF document text
    • https://aa84fbb7-d3ea-4675-94d1-3a2d808898f4.filesusr.com/ugd/661a84_4f63c23e056a48fdb13d67a21134448e.pdf?index=trueIn PDF document text
    • http://wumurunapaxilar.rf.gd/what_is_your_sexuality_spectrum_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d18ddb-fd57-4abf-9919-653df16e7d26/42794455654.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/fosifaf.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_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 5176 bytes
SHA-256: fdae81bc3ae182b344c3ce0bf217b1083b2ffe71cc8bba17bd1ce55ba84753c3
font_01_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 10684 bytes
SHA-256: d7dba2b7017d39881b77082e16c94d5dc52ab4b7c1c5c56bae939e4ee4c9fa1d