Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e11e292d542e257…

MALICIOUS

PDF

83.3 KB Created: 2021-03-27 19:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 552ba1689ffcec610b50cee79484f4ef SHA-1: 5fbbef0fefb54efcd595199c0f487672c1023c3f SHA-256: 0e11e292d542e2573b5784830e652f13b7d42c34435a89ebd9a6d8c4ebe0295d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to domains associated with SEO link farms and potentially malicious content. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links were generated, suggesting an attempt to manipulate search results or direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=insertion+sort+in+data+structure+with+example+pdf
    • http://reform-st.ru/14113581626w4qx.pdf
    • http://itdiscounts.info/rinanugaduvameoirwa.pdf
    • http://piwopamedu.iblogger.org/33244879057.pdf
    • http://fabermanufacture.ru/51104492110n5vuy.pdf
    • http://mbfsopg.com/jumping_the_broom_movie_plotmd2k6.pdf
    • http://katatiboxenosov.iblogger.org/sage_accounting_software_manual.pdf
    • http://dom-bita.org/31154748824eilvb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4a738867-ac5f-4fe9-a91d-17b1a136f20b/samsung_range_display_problems.pdf
    • http://bemogabidemixu.epizy.com/9708928045.pdf
    • https://uploads.strikinglycdn.com/files/e2c2e4d4-083f-4324-8f0a-2e04a018aa45/75123186878.pdf
    • http://wegefug.rf.gd/e._coli_in_urinary_tract_infection.pdf
    • http://xinirujoki.epizy.com/tissot_t-touch_expert_solar_ii_price.pdf
    • https://uploads.strikinglycdn.com/files/ff179fa1-ee8f-44de-87b4-ec0264aad1e4/pibuzo.pdf
    • https://uploads.strikinglycdn.com/files/e73a2152-fe5a-471d-8598-113feb1eea01/50040127000.pdf
    • https://uploads.strikinglycdn.com/files/c66c7f5a-6b10-4307-a674-b724ed11275a/jawomojuvewewivesedivutud.pdf
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_ed53de46659d4af4bd48dace64a949f3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2b462439-5433-48d0-aae1-3a3faf0f4cfc/zitesafajefutinona.pdf
    • https://uploads.strikinglycdn.com/files/e19d3fb6-df76-456c-b3f8-b91eb5fa9dc4/what_is_a_knowledge_economy.pdf
    • http://dudolisimak.epizy.com/nhs_bursary_childcare_application_form.pdf
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_ddec30ae3b1a4e64bf81cf0e5dcf4f6b.pdf?index=true
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_4e84fa9a66c2417fa01662c1d2413f6a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bafdf4c0-bad2-41a1-9637-b1f1598f918b/dometic_8500_awning_parts_manual.pdf
    • http://tekoboworitutew.epizy.com/pesijefinokasatediko.pdf
    • http://tizepadeda.rf.gd/85585702788.pdf
    • https://uploads.strikinglycdn.com/files/0c6f93fc-2b0f-40ef-b413-221e7869a713/75364466838.pdf
    • http://fiwixetigimizi.rf.gd/dixetonozazuvodamosolo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa8.bin
6bf5dd08b4ef9139193d4e16b4480f5da1cbb846d1773eab90922de7b540f82b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 5492 bytes
font_01_sfnt_off00010246.bin
c070178555134baa99558efea74c99d5eecd7b5f57a714baac93878b5ef2f944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 11116 bytes
font_02_sfnt_off0001289b.bin
4354bd37e85197a997b2f6c8c8698034d2711068b41d1b66819094364c364bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 16544 bytes

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