Malicious PDF — malware analysis report

Static analysis result for SHA-256 c024974e2738267f…

MALICIOUS

PDF

78.4 KB Created: 2021-10-22 20:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f5fb3d2dd0fce94f888c8c4f3567a1c9 SHA-1: 533dd336e9f97051d13f97af92b3d709a9f7c9f3 SHA-256: c024974e2738267fe6bd3d62a4642c1fad3d85efe0c355b2087fc21f591e1f64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of multiple compromised CMS upload links and a link farm on disposable hosting strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/47c04db7d69be1d9645dd0f08d8a7716/20908913711.pdf In PDF document text
    • https://renesens21.com/ressources/upload/files/77572115759.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/vumof.pdfIn PDF document text
    • http://gospodarstwotoporow.pl/uploaded/file/37905601644.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/jugirizovoxus.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/51b8852375d6457ab8e6ffd47e2091b7/52914576898.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/rofukupasep.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/46136610954.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/65589706940.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/fukez.pdfIn PDF document text
    • http://capital96.com/userfiles/file/70798153519.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/39ba93c1a562ebf82aea402b57513294/6582589075.pdfIn PDF document text
    • http://klimat.fm/userfiles/file/kipelekofijux.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/29100688624.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/palanugajebenilukusi.pdfIn PDF document text
    • https://brukspec.pl/upload/file/zetolalebisaguvujib.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/xebabegonobakovajozobaled.pdfIn PDF document text
    • https://otohyundaidanang.com/uploads/image/files/wixedexedarego.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/xilirogobesuvumejakudebu.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/3287553383.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/nasalenokexirusojubuja.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/goxakutozomu.pdfIn PDF document text
    • http://nanoservice.sk/upload/file/vemenobonevagojax.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/nikinavafoduveje.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/24255215887.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/40611657580.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1615b18e7a8853---jalinebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/896FEnmJZlk/uplcv?utm_term=i+tend+to+agreePDF link annotation
    • 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_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 17084 bytes
SHA-256: 2572e37370a611a10f02b5f1e56f36c576690fece8fc6f39a448e1d6bd02c3c7
font_01_sfnt_off0000fd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11580 10068 bytes
SHA-256: 647e074630076a44a8898adf9bd6bfea36fc39d968b45fa9e59e44498ba15758

Open this report in the interactive analyzer, or submit your own file for analysis.