Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddcfcece4af7ba5…

MALICIOUS

PDF

79.1 KB Created: 2021-03-20 13:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0dd3148950964f2e832cfd2e39702b8d SHA-1: 1635bf677c94bfd926d7a7c8c66620757ec53a6e SHA-256: 5ddcfcece4af7ba5bd3cb25827385809eb587906b9c3cce1ea95466c3485afc2
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 0.9994

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://dafemum.ru/award?keyword=multiplication+worksheets+pdf+4th+grade PDF link annotation
    • https://cdn.sqhk.co/bofilewidil/rjgI0KU/56084200175.pdfIn PDF document text
    • http://subfamjtii.site/ripinonibatonudijezus1p1bk.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/81047547138.pdfIn PDF document text
    • http://bighome.space/10334866810ubqz9.pdfIn PDF document text
    • http://nugowimabu.mywebcommunity.org/67044241239.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/hCpgcN4/gopijora.pdfIn PDF document text
    • http://igcopyrightforhelps.com/crown_audio_xti_4002_power_amplifierxxw1t.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/eagjhiA/incirlik_barber_shop_phone_number.pdfIn PDF document text
    • http://rotawafuwuno.scienceontheweb.net/ncert_class_11_sociology_textbook.pdfIn PDF document text
    • http://bozesedixek.mywebcommunity.org/sekiwifukubosomot.pdfIn PDF document text
    • https://cdn.sqhk.co/perekowemo/hfiLhdG/facebook_business_manager_instagram_post.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/gdtqqZx/bumajuzusevabet.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/ieUCgje/80942890230.pdfIn PDF document text
    • https://cdn.sqhk.co/wikepijosipi/ajgqjhT/css3_grid-_template-_columns_repeat.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/company_resignation_letter.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/dgjgcgc/270002066.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/kufazete/sisudaxugemekitodu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/46530265023.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/whirlpool_gold_series_dishwasher_heating_element_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/baiju_bawra_full_movie.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/31299729754.pdfIn PDF document text
    • http://moxapowi.myartsonline.com/lesemexalisito.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/pdf_to_word_mac_automator.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_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 5664 bytes
SHA-256: 774a7c54793655a604d45b465df0477af4d3e26063b465e7ed07b96ee1070777
font_01_sfnt_off0001094e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094E 10964 bytes
SHA-256: 7e2b5142cc80baef30d4d0c305b8d02b9776bb0e075343aef8a1578e74c74ce0

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