Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeac90ab4ee7d651…

MALICIOUS

PDF

117.4 KB Created: 2021-03-24 11:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a6abf2e6382407b607b5f5d9b4aa6129 SHA-1: 8e652f741d508631aa5b4c90b4f6cb44291d758f SHA-256: eeac90ab4ee7d651b129a654af06a5cdcbc9c6686d6bc3a3862042e40820bb9d
126 Risk Score

Malware Insights

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

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 0.9990

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 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://midufefew.ru/strik?utm_term=fearless+friday+2a+basketball PDF link annotation
    • https://cdn.sqhk.co/lebapivi/fif8jdy/60536407529.pdfIn PDF document text
    • http://garant-ritual.online/coesia_annual_report_2017se69h.pdfIn PDF document text
    • http://all-gopro.com/gotipaloruxiaq4go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5fe9eacd0b9fc.pdfIn PDF document text
    • http://douchehq.xyz/how_much_should_a_whole_house_generator_costwisjh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_600dec0f893a3.pdfIn PDF document text
    • http://bonifacy.site/bujilimegisidoxonamkwga4.pdfIn PDF document text
    • http://covidcapsule.world/burrow_and_bee_cot_sheetsptt7k.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/iagfgfJ/saudade_tattoo_script.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407062/normal_60065112da0aa.pdfIn PDF document text
    • http://lowwsaw.xyz/dujadidafesujinqnerj.pdfIn PDF document text
    • http://raftgjgr.space/tudoporajarapelitegagaal3k4.pdfIn PDF document text
    • http://jobauthor.online/wirolinvfl12.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/kFjjaia/ball_orange_earrings.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/ihf2vie/wigetitonafuvopumuzoden.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/osu_hidden_skin6o04l.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/dKdDzJB/titibomoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_5fd2c4d592236.pdfIn PDF document text
    • http://instapresent.site/free_noun_worksheets_for_2nd_gradetqb66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_605a8ffb9444d.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://uploads.strikinglycdn.com/files/33018c1b-c91a-453d-9830-f9e85cf8cee2/sepujofasufavisemoroje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/994773b0-1ad0-4057-8376-cbd6c8888cee/matematica_financiera_que_es_valor_actual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed9626e-d472-4dd4-aa8f-d7e06ff6636f/11600701818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0624cc20-895c-4ed0-8680-8b31a8ed462b/dantes_inferno_an_animated_epic_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9b46e65-73fe-4f44-b4cd-85154b2a7806/what_to_do_if_logitech_keyboard_stops_working.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_off0001800b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1800B 4868 bytes
SHA-256: e231fac0410d4ba96a9e0a679d1adfa0e27bba3866daa91e74598ec08c8d6c60
font_01_sfnt_off000190ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190AC 12336 bytes
SHA-256: d9399031d08dc7601f4c6963c7f000fee4f4e0fdbc23c3378b3525cdf7be372e
font_02_sfnt_off0001b9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9B8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34