Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9fac219329e1ff…

MALICIOUS

PDF

90.6 KB Created: 2021-03-16 00:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0cc32b70f1896d964fdf9cee45b4aaa3 SHA-1: 55ff0d0309a0b52a63737b2477d87c3d77cf48b0 SHA-256: ce9fac219329e1fff07f47254d0c3e4e0e6826541fe9e7fe11c8964aa3014ef6
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 0.9997

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/123?utm_term=heat+of+formation+hydrazine PDF link annotation
    • http://besapoxuraver.22web.org/1052584947.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/exdw1ja/the_king_of_tiger_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/bdZdlA1/online_shopping_websites_uk_clothes.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/jaihkjD/motorola_razr_2019_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/ieLQiiw/wupiwizabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_60132ce91d9f9.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/jijfidd/funny_videos_100_impossible_clean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_5fd66557bd284.pdfIn PDF document text
    • http://icily.xyz/org_chart_template_free_excelatokj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_5ffc56843d8e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366018/normal_5fe12578d7499.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/fgchaLF/26151434345.pdfIn PDF document text
    • http://mnogolidov.xyz/american_heritage_dictionary_6th_edition_download4ko4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_604a9292aa9b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kotiximuro.rf.gd/ti-84_plus_calculator.pdfIn PDF document text
    • http://zuferujej.epizy.com/oxford_phonics_world_download.pdfIn PDF document text
    • http://matoros.epizy.com/effective_communication_in_health_and_social_care_powerpoint.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 5052 bytes
SHA-256: 909c23faec0ea07ee240f2d6034cbcad7b8587065a06aeaae66b925ffc5c24ba
font_01_sfnt_off00011ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD7 12956 bytes
SHA-256: d1d04b6cfe7c1682e223a618dc86ac53d70b9529e2745ca86b749662d5fd0fdb
font_02_sfnt_off0001470d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1470D 16060 bytes
SHA-256: cbe2713786541f9211e1884f28e4cf5208f888a724cc80c66e872272f33402b1

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