Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb66dc3e68946e4c…

MALICIOUS

PDF

107.4 KB Created: 2021-03-20 09:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 733032f00fb9b41d14eecda8ea697f8d SHA-1: 11f09c614d2436f42ff582f99e025feb9fe0541a SHA-256: bb66dc3e68946e4c5d687286614f53541a4e8607cd40d1d1e946a1234e7e90a3
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 0.9989

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://nipisod.ru/strik?utm_term=rosemount+8732+hart+manual PDF link annotation
    • http://dezodon.22web.org/columbus_blue_jackets_news.pdfIn PDF document text
    • http://gufosizikok.22web.org/gavivobilebe.pdfIn PDF document text
    • http://vuxuvex.iblogger.org/how_to_reset_a_harmony_900_remote.pdfIn PDF document text
    • http://pubifirona.22web.org/dejisado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zosanugu.epizy.com/56868270591.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/alagey_alagey_album_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/best_unlocked_android_phones_for_sale.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_79cd944f48e34095a8c512b9527de280.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_f2d61e63adaf4ff283d26df6bd30e61d.pdf?index=trueIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_7ec96de761164ca5a225c040c09d935d.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_6cc605f1305545c3b5df033b330e073b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/mla_format_works_cited_books.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/minecraft_official_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/south_africa_house_music_mix_2019.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_92c89b582e154afa9e2c6ab858204a80.pdf?index=trueIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_36b8cee39fca46a585b28414d6efcb6b.pdf?index=trueIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_2151a51e2eab41899470e110c1ed8586.pdf?index=trueIn PDF document text
    • https://ce5d016b-e5fb-4004-af8f-35f61b829e22.filesusr.com/ugd/d7d7f8_2a2f84c9525f4ce38a39687e0f474c18.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_02efb1a814f24a58a173b4b8dbbaf3da.pdf?index=trueIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_4a4518139f9f473bbab53538a18c4d3c.pdf?index=trueIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_74c864d3f10f4050863eafcdae20b88e.pdf?index=trueIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_17ad9201515b4d9697a889d9e6945fcb.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D1B 5336 bytes
SHA-256: 16b2dbb287540933b4fd4e984cdaba88d66811e8bfcd0719d7dc6cdba784b7d5
font_01_sfnt_off00015f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F06 2176 bytes
SHA-256: 69dd1fa014e9a2262d0c16f2a807a7d38ba258e3549ba78461aeb1a26fa4ff5e
font_02_sfnt_off00016867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16867 12124 bytes
SHA-256: 1ddc6a6d0c825ea22cc63f1c59b4b89cb30580309bb4fcef373ace0704a41161
font_03_sfnt_off0001919f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1919F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3