Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce980defa1dda50…

MALICIOUS

PDF

83.8 KB Created: 2021-04-03 18:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b5b0c3438c72175dbd7d6df1783f435f SHA-1: b0b6cc1f6030cc2ff794be4630ec797b717a5610 SHA-256: 0ce980defa1dda5056ecd8fbf1ef1e57153e63e69a8186c2b6571dbaf5c5b451
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://resalured.ru/award?keyword=better+be+home+soon+sheet+music+pdf PDF link annotation
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/kulufonumuverusebi.pdfIn PDF document text
    • http://legendarycraft.ru/44143355797s7bwx.pdfIn PDF document text
    • https://savejesala.weebly.com/uploads/1/3/4/6/134668282/2043039.pdfIn PDF document text
    • http://dsv-trening.ru/zunojinepizamepavitunistkjy4.pdfIn PDF document text
    • http://mihetos.xyz/21799840699krcl5.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/e1c3e9a54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/5238441261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1535ef6-a1bb-4c73-ba34-9ef86442c7f2/5801712826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d9d071-e29f-457c-a596-c8303ec88d43/sony_ps_vita_memory_card_64gb.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/mofewub.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/art_history_masters_programs_france.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/30999726721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3483e520-163d-4bea-990a-446e5cdd5af1/8656486586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e50537-a247-47c6-8b0e-01ff8cca51a6/pictures_of_hollis_woods_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/tabla_periodica_para_imprimir_a_color.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/bootstrap_4_form_group_prepend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a309af38-af66-4d02-a47e-1ee12f7d3fda/nejefe.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/uk_home_office_country_reports.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 5340 bytes
SHA-256: 6dfc8529303d9182ec044fa4e83c61897238bfb3326dc7f23ed3db8cd8569541
font_01_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 11652 bytes
SHA-256: c0ce5f5ba9e3772a20a36b5b997cccc6bdd8be9c6500085db4ebc3cf3410d348
font_02_sfnt_off00012d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9F 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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