Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d0d16e569afc36…

MALICIOUS

PDF

83.3 KB Created: 2021-06-20 01:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1992633dbb606d0c6da7387dc2214f03 SHA-1: e779c6ccbb52668876728b9a2eec5bc2eec87e7b SHA-256: 69d0d16e569afc36dcd9fd1a4f3442f398863ad8872489977a89f7ae689f08f4
156 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many of which appear to be part of a link farm designed to attract search engine traffic. One prominent URL, 'https://nomylo.ru/uplcv?utm_term=descargar+virtual+dj+8+pro+full+espa%25C3%25B1ol+crack+2019', suggests a lure for downloading cracked software. The presence of compromised CMS upload links further indicates malicious intent, likely to host or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/uplcv?utm_term=descargar+virtual+dj+8+pro+full+espa%25C3%25B1ol+crack+2019 PDF link annotation
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/03ff3367fcb62f7e58e1e19a8f1183cb/45811231766.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gaxogotodalekujofoxulideg.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079454276539---zewajadurevikirevapez.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083a2cf1d28a---wixuga.pdfIn PDF document text
    • https://grancom.by/upload/docs/116127637.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/takudelubob.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-30/20210530012439230208.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/646829602.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/056d0f2b6fc7fb32304ea984b30e8e46/50000971691.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2a507cc22c678a706f7c40f705585b7d/13603334505.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/l8fr6kdnhi0d68drgl0nt8o0ki/48299706135.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/80885518550.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8243e82e55507b1d5f983fca95496740/mufetixubaxol.pdfIn PDF document text
    • http://jarosi.hu/files/file/wutizoloxi.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/73e368ca96ef257d57cf71f09a1f0a75/vikodikeronezasedoduro.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/wugefidasefivedoz.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/95011886674.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/fukorujolas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 6412 bytes
SHA-256: 826cd8e46f8ff182725be8ac84bf454a822a200b56177e20e183191aaa496272
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 23348 bytes
SHA-256: 877bf6b421185f7c29b9bff1bf030f38483d026e1abffa2679168e6534fba61d