Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ada170df139129b…

MALICIOUS

PDF

73.1 KB Created: 2021-09-16 20:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d05a9c4b1c2a1b3ebdad30410bc9fbbe SHA-1: 76232a608d5e411878922000caa9f13ae06f4a6f SHA-256: 0ada170df139129bdc34456333acee8ac9f965987fbd5233778259a806a4fdd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for information. No scripts were extracted, but the presence of external URIs and the link farm structure strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/uplcv?utm_term=nerve+supplying+arm+and+hand PDF link annotation
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ciu05a69rgvfhubo2i33r1ffm/95664579696.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/25331437460.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/6c4c5bc73a25b9226d452996bb67e1d7/judukevetuxufowosoxi.pdfIn PDF document text
    • https://cooperspick.com/files/jadiwosisamej.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16136429fc7a11---23448164252.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/gimakiwi.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/953569913.pdfIn PDF document text
    • https://dnm.tw/uploads/files/202109122007252463.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a3716fcb9434c8a881c8bdd40984fe54/82937397450.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/80302913814.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/patipolelasakilajura.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/41094611673.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/ximowujidaxurivudabamez.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/49994831864.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/40546064267.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f45e7ab76ca278e52bad6ac4c998c849/konepidukubunenege.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/71291126854.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/89694961115.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/40807791690.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/53787250700.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/segitenuzuworuz.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/c1c6358460a3ed1e36816db26d2d9f5c/bozepolukilavurulujoraxeg.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/85998843150.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/78646190282.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/nirufaxenolijiwiv.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/46115004843.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://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_off0000bc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC67 16268 bytes
SHA-256: 427631462da109f91647bd7018e9b7af623168e725c04d1606f84cc6cf1f43c6
font_01_sfnt_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 10880 bytes
SHA-256: ec7110b4e41a48883c05218da178112b4e097c7d14af57a7ae5d3199e57463cf

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