Malicious PDF — malware analysis report

Static analysis result for SHA-256 6393f62b40984db3…

MALICIOUS

PDF

74.1 KB Created: 2021-03-18 05:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c2f67fd753a1be7ff82f1ac1f20ade43 SHA-1: b3d2a1dc300d5f3701612146e93966785d466ee1 SHA-256: 6393f62b40984db31eb2041aa1a201de7109235ee0ead22ce4934dce96e27286
126 Risk Score

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://kuzutuzo.ru/strik?utm_term=d%2526d+fighter+battle+master+build PDF link annotation
    • http://gapagal.mywebcommunity.org/arthashastra_book_in_marathi_free_download.pdfIn PDF document text
    • http://freshmind.net/john_g_lake_bubonic_plague_microscope3cba4.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/96034249759.pdfIn PDF document text
    • http://kinoxca.xyz/nebovapuxisaf7tcn6.pdfIn PDF document text
    • http://mxbur.fun/e_district_odisha_caste_certificateetboz.pdfIn PDF document text
    • http://vafakewa.iblogger.org/cd_siz_format_atma_windows_8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewajelawukos.rf.gd/apprendre_python_3._6.pdfIn PDF document text
    • http://wanudag.rf.gd/hp_deskjet_1512_inkjet_all-in-one_printer_manual.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_ee8f492363914a6faccf885105430f28.pdf?index=trueIn PDF document text
    • http://guvukexapa.rf.gd/arizona_civics_test_answers.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_dcf9a0d281a14ec796d47fc80811b275.pdf?index=trueIn PDF document text
    • http://radiviwix.onlinewebshop.net/99860622286.pdfIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/weragejomezo.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/algebra_2_glencoe_mcgraw_hill.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_dac3d3f279c04784ac83285a474a7e5a.pdf?index=trueIn PDF document text
    • http://fotiworoz.epizy.com/nabamifumu.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/94066697926.pdfIn PDF document text
    • http://pemeromerap.rf.gd/96991169660.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_34d254480c594229a68e221ea5442fe0.pdf?index=trueIn PDF document text
    • http://gezixus.myartsonline.com/bilderberg_group_members.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_04c28985c5cd420ab2fee21de6048c5d.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 4156 bytes
SHA-256: 3c306e0ec94285d13e87c04bb9d91e20e74eae243bb960c666b01ded030faf74
font_01_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 10588 bytes
SHA-256: b3a9b2af38257b365bb7af8bcf45a7836744cf9b825e5cf18f99479ae7215484

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