Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0fde2a91f24f9d…

MALICIOUS

PDF

77.0 KB Created: 2021-04-14 16:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4cbc2a540441cb03c9916d52302b9ff5 SHA-1: 709e023ba6dd91ec8e5dc032d2ce18666dac69c3 SHA-256: 2b0fde2a91f24f9dd9fe1ab68d33bcab7d47757b3956e012636687d109383338
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting a mass of links pointing to other PDFs. One prominent URL, 'https://maypoin.ru/strik?utm_term=how+to+thread+brother+lock+1034dx', and another, 'http://rowomonug.mywebcommunity.org/80156087838.pdf', are flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=how+to+thread+brother+lock+1034dx PDF link annotation
    • http://rowomonug.mywebcommunity.org/80156087838.pdfIn PDF document text
    • http://jotipire.iblogger.org/north_and_south_america_map.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/oligopoly_features.pdfIn PDF document text
    • http://kosolibanun.iblogger.org/angularjs_adminlte_template.pdfIn PDF document text
    • http://bilizan.iblogger.org/new_york_city_map_art.pdfIn PDF document text
    • http://malasimujafisim.22web.org/zoology_book_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_21704b44f27c4c9793df975354144aa9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/liszt_la_campanella_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/saxoj.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_b42a11541a8144cab7a9a8d99fd5da61.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_3b810c55e8f54957957b79a06c988244.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_d139043905784462a08c8d7964fe123e.pdf?index=trueIn PDF document text
    • http://lojuwuwa.rf.gd/20400347608.pdfIn PDF document text
    • http://gowesano.epizy.com/53837549988.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/art_deco_interior_design.pdfIn PDF document text
    • http://zaposupi.epizy.com/dimujabonemukelezebulu.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/vexokirawesuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/32727265223.pdfIn PDF document text
    • http://mirowoke.rf.gd/mifubatanetexofu.pdfIn PDF document text
    • http://puwurivetib.epizy.com/adventures_of_huckleberry_finn_by_mark_twain.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/92584395484.pdfIn PDF document text
    • http://rokimaligevijep.rf.gd/download_buku_akuntansi_perusahaan_jasa.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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 5620 bytes
SHA-256: 4d462681098f196d9c28a6d7eb3b9f08a63b7b5ac10660d540cf357f7cabefb9
font_01_sfnt_off0000ff43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 11712 bytes
SHA-256: 921c46b85210cb4b0d84161f89d73232b1f4a506c4dba294dd44e7ab46def049

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