Malicious PDF — malware analysis report

Static analysis result for SHA-256 49670138b525c435…

MALICIOUS

PDF

98.2 KB Created: 2021-03-14 12:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd0d3cf205e9d60c8eb34acad7f1bbdf SHA-1: 9d6b06990d0b28e08ed22289b291c4764be6ec3a SHA-256: 49670138b525c435f3c1b3721738cef6971b7a3aa9f0f4a59985612768ce6eb0
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 0.9993

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://pelibifir.ru/wix?keyword=ar+verbs+in+the+preterite+worksheet+2+answers PDF link annotation
    • http://adachivia.store/42348570541ab91y.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/princeton_review_sat_math_2_practice_test.pdfIn PDF document text
    • http://letgtma.bid/nelazq3uon.pdfIn PDF document text
    • http://remastacer.com/ordis_voice_actor06v2m.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/uniden_d3098_dect_6.0_loud_and_clear_corded_cordless_phone.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/ds-ga_1003_spring_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_c9641e51f5cd43e2af669280f502cfac.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_d9fda34dd258476bbb464efef0d9a1ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/sosuronegutula.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/dbt_wise_mind_accepts_worksheet.pdfIn PDF document text
    • http://wififeju.atwebpages.com/ophthalmology_clinical_vignettes_pemberton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bdc9eed-6842-46ec-99b6-384c3a313388/lewagawinadeforu.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_d50030833c874cf2a44750dd5d7dedb7.pdf?index=trueIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_1ae325f9471f4e019ed3640eb371bedd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitirew/dingwall_and_highland_marts_sale_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/property_inspection_report_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/bimal_jalan_committee_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fbc623b-de56-40b6-9d22-4167e9ca2dfb/kupepedodawab.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_eb7a681735754e65ac62cc8f10f9976c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea710dc-409c-4df8-b6a3-8b006ed8e736/basic_english_grammar_book_2_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf4e5f5-1085-45ec-8696-76a333dce445/how_to_reset_income_tax_password_through_dsc.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/kendo_mvc_grid_template_dropdownlist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3764382d-cbd5-42d1-ac9a-cee4385a24fc/weledo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC9 5352 bytes
SHA-256: 81758935e987f0fe99dd18b320694d8e2213c9bfd34456c31f3ad9f2f1d4c993
font_01_sfnt_off0001510a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510A 12888 bytes
SHA-256: 900c7b2986818c10d0aeb999883621f5fa9ac956266ba9698daabd56de3209cc

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