Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6721d7dac1a357…

MALICIOUS

PDF

126.4 KB Created: 2021-03-15 19:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8ec624998f75a3a781d7bfc174f47f1e SHA-1: f13795d5b3101efa86ce6b4f4d6b88e3aa826087 SHA-256: 9a6721d7dac1a3571056b54e88e90a5db64d5d0c36c2e5a4a928b69c2723e538
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The primary malicious URL identified is 'resalured.ru', which is likely used to redirect users to malicious content. The presence of numerous external links and the ML classifier's high confidence score indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/aws?utm_term=are+cabela%2527s+dehydrator+trays+dishwasher+safe PDF link annotation
    • https://febovaze.weebly.com/uploads/1/3/4/1/134131302/nozujevozimetovidoli.pdfIn PDF document text
    • https://lolejubabam.weebly.com/uploads/1/3/1/3/131379737/2c4b2ed.pdfIn PDF document text
    • https://piwaxiru.weebly.com/uploads/1/3/4/8/134882920/8843191.pdfIn PDF document text
    • https://pisexenileket.weebly.com/uploads/1/3/5/3/135350899/4053172.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/birorewemepajisufexaleda.pdfIn PDF document text
    • https://remezovegaz.weebly.com/uploads/1/3/1/4/131406605/8834979.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/jarogudibilevesuso.pdfIn PDF document text
    • https://jotavitot.weebly.com/uploads/1/3/0/7/130738821/1631592.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/vonutavekip/new_bollywood_song_audio.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_cc165320b9b046c7a89f2308c3087ece.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/piano_music_sheets_with_notes.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_88c1db52a5f04d85a40c493051fddc9f.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_61efdb1716f04edb9d1e052338aeef5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/brightsign_author_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/bixby_home_apk_9._0.pdfIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_6cd3ea702796466ba58dda20eb90e557.pdf?index=trueIn PDF document text
    • http://saxodanokijaj.atwebpages.com/mecanica_vectorial_para_ingenieros_dinamica_10_edicion_solucionario.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/fodixuwanikapotuseko.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/aegisub_portable_free.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_172ac96dc3444d5592fb03f64752b59e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/factorization_worksheet_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/crowley_lake_guide_service.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_off00019df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DF3 5468 bytes
SHA-256: a3dc20cf8cfef4c87e5565f8f9c0b1912a7bae2613527a1f037015f98b37c500
font_01_sfnt_off0001b09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B09F 10868 bytes
SHA-256: 771704e52aad1445a585581bb411b037f4f4151e302bc9ab87125782bf5e6160
font_02_sfnt_off0001d5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5F0 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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