Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf0504558327294…

MALICIOUS

PDF

82.0 KB Created: 2021-03-15 14:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9e5bd3a41de1a6c2de4834768f1aa3f9 SHA-1: 20791421f1c1d81ce3faba000230a41a053ffd69 SHA-256: 9bf050455832729464efb6664e4baf941b5e8787d856aa406646da9fe135f159
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=cancer+de+prostata+pdf+sintomas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490516/normal_5fd36f12b4e46.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/kOhhieM/xuwozemedojirajagowaka.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/BjfjaUQ/66647073026.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/fgjgfwl/53063764721.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/tUrxqhb/finitujetiforapatomokim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_604e593d895ce.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/bjhggOb/bounce_tv_channel_number_on_directv.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/hcjaSgt/5690880182.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/d924b085-0cd1-4ab0-9ead-463a0068a377/difference_between_t3i_and_t5i.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56573fb8-6a97-4257-848b-4bd8898c7b76/baby_jogger_city_mini_gt_double_stroller_bassinet.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/liwaxofa.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/minadax.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/pert_chart_template_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/duvifakaxovesuxel.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_3fdee746642a4e7cb53b47c8847e8fb6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf0fa39-937a-4e67-8e22-e35f88047307/xitofepuvinepejozure.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/lion_dance_drum_sheet_music.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_9684bad307aa4ff5a72e50d4f00b3fa9.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_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 5172 bytes
SHA-256: b1aaf8d41dd7c32457b624a50c6182db95ff35ce2d7e616f6c5fc33a35b97c69
font_01_sfnt_off000114b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B1 11316 bytes
SHA-256: 55d4c52d8d503298dac3ea43e5a09cfc4f9e6dcffc80db480f796199b84a768a

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