Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce0db7f4ebd9309…

MALICIOUS

PDF

67.8 KB Created: 2021-04-15 03:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 33c878888a73f9adfee0d0db1b44b4cc SHA-1: 2f1b4f4bbe31ef34d79b67eb5c69f7f8a2684ab8 SHA-256: 4ce0db7f4ebd93095ff597f8c2202d6185432020ff3df0dc8f4fc400e924bf8d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URLs, with one specifically pointing to 'soxebez.ru', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by identifying the PDF as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=tafsir+ibn+kathir+stories+of+the+prophets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366011/normal_5ff7614f09f19.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/cahier_de_vacances_cm2_vers_6me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_6029c35ed5cb4.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/idiedLP/hola_music_zebra_ukulele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481836/normal_6035a900569dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469105/normal_5fc68ac4eb3d3.pdfIn PDF document text
    • https://cdn.sqhk.co/gumojitoxowu/jcthjja/let_s_talk_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/hghhDhg/21473423364.pdfIn PDF document text
    • http://jsexj.fun/tojifororaxafunufudevoyz5w5.pdfIn PDF document text
    • https://cdn.sqhk.co/xadeviro/jeghcjc/jedabazug.pdfIn PDF document text
    • https://cdn.sqhk.co/ronutalin/cjjjhje/cantos_jubilosos_lldm.pdfIn PDF document text
    • http://labincom-med.ru/kadhal_kavithai_movie_songstuqme.pdfIn PDF document text
    • http://shopsupergood.site/free_autism_stuff_2020_uk8yja6.pdfIn PDF document text
    • http://com-connexion.xyz/dofapqc9ho.pdfIn PDF document text
    • https://cdn.sqhk.co/vipotukivisi/fidBcvz/competency_development_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390051/normal_6007c095d6998.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_b6a7a557468a4e94b422225fdd39409c.pdf?index=trueIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/73rd_amendment.pdfIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_9bd49184bf484001a454c6d9f1800b15.pdf?index=trueIn PDF document text
    • https://cf21b241-1edd-4e7a-8b85-4b7fa12bec5a.filesusr.com/ugd/835652_fac281f7899d46b79e0533de4432689c.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFF 5112 bytes
SHA-256: f56c03dd59841010d1c11a4651832f8b4b247a1cc039e83677e75a3d096f3d50
font_01_sfnt_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 10164 bytes
SHA-256: 970317f8a6dadc9dcf86d1aabeb3cb7123e83ec75a29a68c6c91b8914c4e8ef5

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