Malicious PDF — malware analysis report

Static analysis result for SHA-256 60da73842b74a931…

MALICIOUS

PDF

76.4 KB Created: 2021-05-12 18:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f805de3ac0ddbb4db61b8bf78a5511b8 SHA-1: 1c8d2dd3a43b204e63c26e40d174d225c9455324 SHA-256: 60da73842b74a9314ac28d45973417c7b99c9ebd49e2bf529aae169b786cacf5
156 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 0.9993

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://dafemum.ru/strik?utm_term=how+to+connect+hp+printer+to+wifi+deskjet PDF link annotation
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/topazelelisibeb-lemos-buruvazit-xipogeba.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/bd7b54.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/puteretabexarep.pdfIn PDF document text
    • http://sipidasurow.22web.org/juwoxopu.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/c2d9d8b65ee1b.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/tawovojo/terogaxu.pdfIn PDF document text
    • https://63209029-b609-4f89-80e5-af59b408cdb4.filesusr.com/ugd/0713e6_65e77ac591584c39994804595ffd242b.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_d892f4268d54471f9b8973f1c3a2cfed.pdf?index=trueIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_d41e5462dc994f4cae076d510885ba08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/satonaboratafadamubu.pdfIn PDF document text
    • https://73b3f487-90f5-41a6-bf44-750372f72efd.filesusr.com/ugd/39e8d0_52944dd733264051b072470e686085a1.pdf?index=trueIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_8c091a1017264a6d8a427f58cd4340b9.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_a900eb2988a9476a8dc3ef307acda524.pdf?index=trueIn PDF document text
    • http://merojupamen.epizy.com/fikuf.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_6c02c33738c54c3b83ac1318246ca014.pdf?index=trueIn PDF document text
    • http://kotalozobazad.rf.gd/24158213008.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/82449291851.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/gilezosojineferogozos.pdfIn PDF document text
    • http://dovobol.epizy.com/diet_for_dialysis_patients.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_e2cc6d8f85494e04aa028d16f06ca5a9.pdf?index=trueIn PDF document text
    • http://kuminatunajovop.epizy.com/c._i._d_serial_ringtone.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_69df91ed8a074b5bae541854a002d3ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/zokaxa.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_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 5196 bytes
SHA-256: 603b90e173c6b33340e2ab062024d7b0b331f48f44bbdd42b123d969c9b8b7d2
font_01_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 10908 bytes
SHA-256: 135fcfdd0c476fded8007800b74c506e907cde8f6010250b2c00495b0d3ab5ca

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