Malicious PDF — malware analysis report

Static analysis result for SHA-256 430c2467871f9ed4…

MALICIOUS

PDF

72.9 KB Created: 2021-03-12 01:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b6452264a6ad0d3eb41c9664aa1f9b93 SHA-1: d04ce43c4310e6fa68e5d83fb39e9989422f48ea SHA-256: 430c2467871f9ed4b87587688fddfae342c9e3fe4d515120306e8afb05a177bd
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 0.9952

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=kimi+wa+008+-+raw+chapter+92 PDF link annotation
    • http://dakekunagefasak.sportsontheweb.net/78129594024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_601326a71b83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_601ca857993cc.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/it_associate_salary_state_of_california.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/fgdiAjc/kogapav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_604a480fc84e5.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/additives_in_plastics.pdfIn PDF document text
    • http://pixilapusir.22web.org/ml.net_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/idZZidF/dofipanikuzow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_601fb100aed7e.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/giciifg/fall_guys_running_speed.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/kxZOvia/fikogamiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_6001353283ac6.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/jeRWytw/wosojuviguviduwefalisidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://golunelew.epizy.com/corsair_k95_platinum_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d095200-e71a-4664-aa13-4cc76ab87962/96486095469.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/makebonejudu.pdfIn PDF document text
    • http://felugibesixe.onlinewebshop.net/22366571320.pdfIn PDF document text
    • http://xibaxet.rf.gd/new_pakistani_audio_songs_free.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/batho_bana_ke_bao.pdfIn PDF document text
    • http://relilirijupike.epizy.com/65659520127.pdfIn PDF document text
    • http://vajitefafuxuz.epizy.com/nadaguides_connect_login.pdfIn PDF document text
    • http://lugimes.epizy.com/sesumiremowowurogaleze.pdfIn PDF document text
    • http://pebimomedunuzux.epizy.com/zixudopomopolovakugaxu.pdfIn PDF document text
    • http://xujiwusa.epizy.com/27062346016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160d80c7-a1c9-488b-b41f-c5dd58257d81/whats_another_word_for_day_after_tomorrow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21B 3392 bytes
SHA-256: cc450a1e4f04f4623db62e13b1c95312faf5768fcba33bbf8181d4724953504a
font_01_sfnt_off0000de42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE42 5680 bytes
SHA-256: 8f360b0ef7184cf188781035e8f35e0dd6042b7ece85f459f10ccf9ed2042bf5
font_02_sfnt_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 10416 bytes
SHA-256: f45b366bae27d1d5acb23a20a925a18b3b77328609b38b57ae1d6df958eee74e