Malicious PDF — malware analysis report

Static analysis result for SHA-256 e957066dd2346445…

MALICIOUS

PDF

77.9 KB Created: 2021-03-21 21:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5fcfc6fee293b1390fdc4547521a813c SHA-1: c33fe55610e4e0a8510170c202b0caf80680e4f1 SHA-256: e957066dd2346445d6aee54d6bd5469cc8e4ef3c850f3e2284435aa14d19ffa8
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 0.9996

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://resalured.ru/wix?keyword=animal+cells+worksheet+answers PDF link annotation
    • http://avit0.cc/handwriting_sheets_for_2nd_grade9wyft.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/pS4iaOc/sad_wallpaper_hd_love.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/aeiemjg/kisudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_600c9ea20c5fc.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/ahehg6p/star_wars_cast_2019_keri_russell.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/georgia_drivers_license_name_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_60483817a4b09.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/eih3HdT/english_to_arabic_language_book.pdfIn PDF document text
    • http://about-central.com/how_to_use_loreal_feria_hair_color38u07.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/27904901475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_601347eb67639.pdfIn PDF document text
    • http://futejupo.iblogger.org/puninuvokozekumelowip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495269/normal_5ff4f8a13d3e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421336/normal_5fe390321e827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogujigasad.onlinewebshop.net/62004359103.pdfIn PDF document text
    • http://duwufinojitu.rf.gd/33411606005.pdfIn PDF document text
    • http://nexiwamuwi.rf.gd/excelde_aritmetik_ortalama_forml.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e630a87c-a12d-4d5c-9d4d-16826e39a2cc/mekesixovawaf.pdfIn PDF document text
    • http://foguduw.epizy.com/categorical_data_vs_numerical_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8578e912-c1f9-47ca-ad1b-aa694691b2ef/dilatawiwifixepasugexileg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf8a223-a317-4035-9bee-0e1899244cea/54633949434.pdfIn PDF document text
    • http://ribibepope.epizy.com/vafuwalifesepigetafawa.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_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 5184 bytes
SHA-256: 83b78492aeb7aa2f507ab876a1ed35e56d7b030a57b4fdb40bebb8e350f368d9
font_01_sfnt_off00010716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10716 10404 bytes
SHA-256: 3d0dac02e159380ba926fe5b11ccf414c187998665276699b35430e6b757e1c6

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