Malicious PDF — malware analysis report

Static analysis result for SHA-256 77146698e00c87ce…

MALICIOUS

PDF

86.3 KB Created: 2021-03-22 02:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c2516ef4e5210cfe0b1ef97b61794e7e SHA-1: 95ef4aeb1aba48ba41b58e36b41ffe8c1fdf7ab4 SHA-256: 77146698e00c87ce43fe5b8bad2216452ef66fb70173ccfc876d7c9531fe105a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm, potentially for SEO manipulation or to direct users to phishing sites. The primary IOC is the suspicious URL 'https://soxebez.ru/wix?keyword=miley+cyrus+e+blogueira'. No scripts were extracted, but the PDF structure itself is leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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/wix?keyword=miley+cyrus+e+blogueira PDF link annotation
    • http://7lessons.site/xojenuaf158.pdfIn PDF document text
    • http://rezltml.xyz/japanese_candlestick_charting_techniques_reviewb0tx9.pdfIn PDF document text
    • http://tiktokfrance.fun/bexifuzizijenasa4q24z.pdfIn PDF document text
    • http://canonsburglake.com/essential_4000_english_words2h70w.pdfIn PDF document text
    • http://teenagetutor.online/5841344523007kpb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc541ae-5283-472a-961c-828a633338f2/rajezufozumemelugarur.pdfIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_dcddc70c391247739fb991cf2dd419c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0404f8a7-8f36-4225-a55c-eb5e2973569f/baromefixunezamimigotep.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_63fb0b26b360436ea21508e252aba5ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e43b643-1d37-47e2-80ff-f370a574b6ef/lopanazifumivikarit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec00a46-a7cb-4bed-865f-77e14793ce94/44109025397.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_845d1ad7911a4cd3b465be5d5d7795c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/47807451174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebbd3ef-d593-4ea2-bc04-a0568cf525cc/zavalesafuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d38b682-bb11-4aac-a1bc-0b23a4f79944/6018113438.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/child_care_authorization_form_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/reality_testing_assessment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b3e24e-e788-4dc7-b811-257f9e9cd158/tabela_salario_policia_federal_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f842998-e738-43fd-bbb2-3e251473ac46/cva_wolf_.50_cal._muzzleloader_with_scope_mount.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/8352179030.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_0c6945cbbf5c45f194e1f892095e0c52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/826598d9-ec16-4428-a96b-effb0177afac/massey_ferguson_35_parts_northern_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3dbe9c-7bd2-426c-ae75-fc2a1946f7fe/john_deere_d140_wheel_parts.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001145b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 5216 bytes
SHA-256: 4f15710cdc97026c7407bacdaddbb616fed8029500ff1360ef340f250cb68bb1
font_01_sfnt_off0001263f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263F 11044 bytes
SHA-256: 67b95729ad6f48e1d7acba600768a23c33ef6c77932574a3f6e4502579218888

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