Malicious PDF — malware analysis report

Static analysis result for SHA-256 782e449f394b0037…

MALICIOUS

PDF

75.7 KB Created: 2021-03-14 13:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6e6f1338366ca241a047dbfe86737984 SHA-1: e6bb3d79e0b83d1858f37dd96b6aa54bb34d0f1b SHA-256: 782e449f394b0037b50b5fbe032ddbd3361aef4ff0f2c760fbcf06a4b2086784
156 Risk Score

Malware Insights

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

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 0.9995

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://dugedepap.ru/wix?keyword=world+history+textbook+chapter+6+assessment+answers PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_97d01ef7b163468db78f78dfe7953de4.pdf?index=trueIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_105376139ac447179a56a39117edd157.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_ec3b60a412554e859fc3d44e0f1f777c.pdf?index=trueIn PDF document text
    • http://posivunoloreweb.rf.gd/jufuxoxadi.pdfIn PDF document text
    • https://13a2bf7a-7930-4518-a7e6-737bf3c0aa4f.filesusr.com/ugd/f5c1a0_7755e9a555d3488394c795b18d27b7af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugafebip/family_feud_survey_questions_funny.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_f0c13bd5fce14aadb5d9adbbfb898835.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/girlfriends_guide_to_divorce_tony_and_delia.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_cb6aa62ecd044faea26a11a3f43ba6cd.pdf?index=trueIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_f5e9394d8c8447838c497069d8b23108.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/81230998387.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/ejercicios_de_limites_indeterminados_0_0_con_radicales.pdfIn PDF document text
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_73d2c64f4e1f492db57783d8e35040db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/87876204392.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_61571327dfd64e859264307dc9e1d0ff.pdf?index=trueIn PDF document text
    • http://nuxibuzejapise.epizy.com/concept_design_report_sample.pdfIn PDF document text
    • http://kunijudodo.rf.gd/japuxulezu.pdfIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_581a0237c81e4d78877a1af235c58bf6.pdf?index=trueIn PDF document text
    • http://sivuvupaxiju.rf.gd/puvubetigivimo.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_dd577cc4756c495da6cd891573b03f04.pdf?index=trueIn PDF document text
    • http://borovob.epizy.com/desercion_escolar_universitaria_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/gujafujonolikateto.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_off0000e6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 5944 bytes
SHA-256: b0704dc6e08d4557801c89af3ceb59814ed70e8860505838b83b28d9c79b10a7
font_01_sfnt_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 10452 bytes
SHA-256: 246111a0d6847bcab930ea93384790d783dd94e3c39219d7024735a069f6f4f8

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