Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e7f14040a817b3…

MALICIOUS

PDF

81.9 KB Created: 2021-03-30 09:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 13330c74672fd2d5b46f6deaf6529d28 SHA-1: 5f77af69153a8771a84ac7cf5641b54843a38401 SHA-256: c6e7f14040a817b33f20abf2fb56091ef932cce78c985a858fab0b7ccfa1105e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one pointing to a suspicious domain ('gimoguvi.ru'), suggesting it functions as a link farm to distribute further malicious content or phishing pages. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

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 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.
  • 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://gimoguvi.ru/123?utm_term=you+answer+place PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404983/normal_5fca2f83daf5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_6000515987af7.pdfIn PDF document text
    • http://winclean-shop.space/anaerobic_respiration_in_yeast_lab_reportvx7h0.pdfIn PDF document text
    • http://buloshnaya.site/50903650109t394b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379959/normal_5fee434af12d3.pdfIn PDF document text
    • http://ubsvp.com/ludwig_s_anginawws1w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_6062592c468ce.pdfIn PDF document text
    • http://qupieasy.online/como_dividir_una_circunferencia_en_n_partes_iguales3teqv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_60191753d45b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403282/normal_60045579be4e4.pdfIn PDF document text
    • http://jopkapopka.online/14719303622dxl9a.pdfIn PDF document text
    • http://vbruti.site/lingua_latina_answers4aexk.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/ziziws7t5s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5fda9094187f6.pdfIn PDF document text
    • http://tur8osale.site/2011_traverse_window_wont_go_upet6vb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407781/normal_5ff971e9800f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_ffd78eecd2ed4adda4570f6672c6ea4d.pdf?index=trueIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_f312e68c62284e939e50666c95e04f13.pdf?index=trueIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_3dfdb63354c444ed9c7f1c7c3f4fba09.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2955d6-f191-41fc-9765-d71a84a05522/english_conversation_practice_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad2ab5f-4899-40a0-9686-a219d2009f5e/how_to_make_a_man_pursue_you.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_43696c0a44b247149fd1b96f0c9bae29.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_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 4980 bytes
SHA-256: 59c0649e20d5957959c3c543d659bef824fc39504013717269ebfb79716d1291
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 22548 bytes
SHA-256: a939e94fc6113f9ea0dc7529bcb4a48ff3ada9c196a9899b3ec0ef72cb2a8128

Open this report in the interactive analyzer, or submit your own file for analysis.