Malicious PDF — malware analysis report

Static analysis result for SHA-256 250337b02b26f780…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 09:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 878b8c91c2cfe532cbc8a3406028e679 SHA-1: 5eeb2a68b852a6248562a055c9b0a9b7679a1625 SHA-256: 250337b02b26f7805ddaf7eec773882c0899f23e233fd87484b36147f5d49545
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://baarspo.ru/wix?keyword=tipos+de+suelo+en+mexico+construccion PDF link annotation
    • http://talajudoxuxip.mygamesonline.org/genewapabefodagozeralif.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/budget_2020_highlights_income_tax.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/lowrance_elite_5_transducer_cable.pdfIn PDF document text
    • http://tujemet.scienceontheweb.net/mathematical_induction_inequality_examples.pdfIn PDF document text
    • http://femetorisufi.sportsontheweb.net/the_blue_book_of_grammar_and_punctuation_11th_edition.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/adobe_reader_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/36293828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb6b1e2b-87ef-4c71-bf50-eb639b041e7e/what_is_the_nature_of_inductive_reasoning_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ead557-40e0-4950-89f1-075f29ccdd46/gopope.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/modinij.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_4f630cfc74ea418ea1b935fc1aa56bd5.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_ed776f49a5a2425183528fcfb4c500c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75c23ed-39f2-4ef0-b333-a08fc23610c7/the_book_thief_sparknotes_part_1.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/ruliwadef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2962846c-ad55-44fb-907b-824af79ff66b/how_to_clean_vicks_humidifier_starry_night.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_b535d4aa156c4b76975602cf6e04c081.pdf?index=trueIn PDF document text
    • http://xolevusafo.myartsonline.com/32286535886.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/mexotexupenesax.pdfIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_a3c8fe5a43b54994baae8f0e34b3dd72.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 5028 bytes
SHA-256: 3d2fbc8fb4ed736eb755ec881d5bcb46ae90c822f0856f5072c325ffa92e8980
font_01_sfnt_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 11252 bytes
SHA-256: cf4e7b8eb6972afa503da443e17bc7d44e8b735ad74eaaa5454d3b2ebfa6d172

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