Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff2dce3c6106cdf…

MALICIOUS

PDF

108.2 KB Created: 2021-03-09 03:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 293407a9902f9a332771d61f811b0111 SHA-1: 67e0fcde7e4fa1144ed2d8b722ada2eb30d87e14 SHA-256: 8ff2dce3c6106cdf4d3237a9fa749032fb8c9d578b1b32b283cb9a0794d90663
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with a primary focus on redirecting users to external sites disguised as search results or downloadable content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a deliberate attempt to create a link farm on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/award?keyword=elementary+set+theory+book+pdf PDF link annotation
    • http://wolifote.getenjoyment.net/75279810009.pdfIn PDF document text
    • http://chempion.coffee/teora_del_universo_pulsante5aoj1.pdfIn PDF document text
    • http://fb-ig-copyright.com/655386436702x4jb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_6046b37be3c84.pdfIn PDF document text
    • http://mibenovapus.22web.org/what_kind_of_oil_for_honda_1000_generator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484118/normal_5fc7fd1cd06e8.pdfIn PDF document text
    • http://trendmobile.ru/89457713922492vb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_6016ff1f27d5f.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/34837539021.pdfIn PDF document text
    • http://bestrongbyg.com/95226114945mco4x.pdfIn PDF document text
    • http://brumbum2.xyz/war_thunder_enduring_confrontation9rd1j.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/angels_of_death_video_game381sv.pdfIn PDF document text
    • http://rawoferifexa.22web.org/gentilicios_de_espaa.pdfIn PDF document text
    • http://xalapuzim.sportsontheweb.net/lean_bulking_diet_plan.pdfIn PDF document text
    • http://tk-pobeda.site/short_plot_summary_of_a_streetcar_named_desiret8iaz.pdfIn PDF document text
    • http://thelandofbadideas.com/pulejubibe1yyvv.pdfIn PDF document text
    • http://worodariravo.22web.org/wizard_leveling_guide_bdo.pdfIn PDF document text
    • http://yoga-fitness.space/132654151564u2ct.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumuwejonalar.epizy.com/fukabenugukusibekatexir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72996db-e937-4d5f-9904-5dc65c6b7b94/goribidibiwidajimobigi.pdfIn PDF document text
    • http://goguvero.epizy.com/8575522039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e31d1607-2e58-4eb7-88b9-efe314617d88/45797801302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02296394-f3c1-4f9c-a6fa-c771e70ca140/sig_p238_vs_p938_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c023682-c653-462b-9bd2-b752da660a3a/sexidoketoxe.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_off00015016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15016 5544 bytes
SHA-256: 3c93ad9a05d2b8711251fe4c1e9a3c279f86dd83b05be0b4a5afa4096c5b7a93
font_01_sfnt_off000162ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CA 11692 bytes
SHA-256: d6fc64465bde8ca8207e8d21ba523314e943aa2575b88a869975b540a33f980a
font_02_sfnt_off00018aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AEA 16904 bytes
SHA-256: f238ef75f7c5af64267ac69796ba96883c13605ef27d6aa5da7bab26cae918a4