Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4afd4bf3413faa…

MALICIOUS

PDF

83.2 KB Created: 2021-05-01 05:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2bc6e090276092d6d9648a9f5d19a578 SHA-1: 124d8fa722dd3220d1c2f4c6f80e4c348a9b124a SHA-256: ed4afd4bf3413faa8049381721c8d1940b068df046d054314c7ffd666b00b6bd
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 0.9992

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://baarspo.ru/strik?utm_term=msi+970+motherboard+manual PDF link annotation
    • http://fefosawixamuwow.22web.org/ripawas.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/pengertian_metode_bercerita_menurut_para_ahli.pdfIn PDF document text
    • https://rosikotukixaru.weebly.com/uploads/1/3/4/3/134312973/dekofazabovufe.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/bejimap.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/95643272442.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/3561350.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/xajuvapolipi.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/dutigoxozopifomipozedop.pdfIn PDF document text
    • https://wivozodibadire.weebly.com/uploads/1/3/0/7/130775536/5207829.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/e98943e0.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/2817cc688ff661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_1eca277eb1c849d4abf77ef8d00bb7fb.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_891215cb81a5440984c34565c8ef08e3.pdf?index=trueIn PDF document text
    • http://wawaxujogoned.rf.gd/fokami.pdfIn PDF document text
    • https://681956c7-2c57-495f-b996-d04b50c745b0.filesusr.com/ugd/907d98_a9474841b31647c2879f483d5b6a60ed.pdf?index=trueIn PDF document text
    • http://votixeju.onlinewebshop.net/gupufed.pdfIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_03ef4a8dd25c4759987874a887ee3f87.pdf?index=trueIn PDF document text
    • http://kagejadel.epizy.com/bafefixozoralenugi.pdfIn PDF document text
    • https://e1c07d4e-6587-4767-b76f-5dea9cf3e327.filesusr.com/ugd/51a829_d1aa84432df1407f8cbb53b21205026c.pdf?index=trueIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_5793a7056cca4634a32858df826f0301.pdf?index=trueIn PDF document text
    • http://kofepiropi.onlinewebshop.net/73410802283.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_116bcb0e71c1439c8342d1f424a66c61.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_8c416898fda84d178df35a8787f3cb0d.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_off00010392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 5588 bytes
SHA-256: 7effe4c4ee4dead93101e8e68c7674b7df1bfa77c0fe2996c20a9cc968224d12
font_01_sfnt_off0001166a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166A 12360 bytes
SHA-256: c0474fd412aaf112c74422411d22bb39d4ea326d503e615c0c861c3149b01fee

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