Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee024743c5f40511…

MALICIOUS

PDF

79.0 KB Created: 2021-04-04 01:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b8aafe2a933ebb8cf88dcfa255e2c73f SHA-1: d78eea734531cd41268154f6a6f88b53fddf9f52 SHA-256: ee024743c5f40511c9f80fa1a8e4e0df49f2c105b43771a3291b062d544fd7c3
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 0.9998

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://bologen.ru/wix?keyword=mom+and+pop+jewelry+stores+near+me PDF link annotation
    • https://cdn.sqhk.co/dajuzafum/ecXtkvl/the_sweet_house_llc_rowlett_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/nosilaxuziz/rFFjjbS/18009540667.pdfIn PDF document text
    • https://mateboxabivof.weebly.com/uploads/1/3/4/7/134763458/f0766875f4.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/dikam.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://razvivatel.blog/rowunolanajuruzijopif7dkwt.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/karomosenizefugago.pdfIn PDF document text
    • http://omoikiri.info/skyrim_enchanting_guide_for_magesy0xlv.pdfIn PDF document text
    • http://spainsale.pro/34009943342ensfq.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
    • https://s3.amazonaws.com/xalasawu/journal_ennahar_du_jour.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/32699901256.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/59597107251.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/56459505958.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/professional_powerpoint_agenda_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/how_do_i_get_rid_of_news_break_app.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/guidelines_for_spelling_bee_contest.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/95601821187.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F3 5120 bytes
SHA-256: ac5fe9f2e891359a0ffc981535dd0c402b29e10c6ac61c0337224fbec94e3fc3
font_01_sfnt_off0000fb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 10888 bytes
SHA-256: b8699022bf5a0c5d53aa559b4b1de5d0362f84c3fd6e4baf9810699bc1bb1a3d
font_02_sfnt_off0001207c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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