Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4b02063f07f98e…

MALICIOUS

PDF

80.5 KB Created: 2021-09-13 07:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aa9bf894d92abbab343d4a972a0bb72b SHA-1: 78d95216d03606837201170e85669225f077c420 SHA-256: 2a4b02063f07f98e4bc0a7b3ccef3ac3949a905db058ded9ff29e3b3a76b68bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URLs are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=king+of+the+hill+putlocker PDF link annotation
    • http://handbook.hu/upload/page/file/robafagikaf.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/ruzoviliroxovoxopalo.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/16d7411e40af1060c68b86b904c4c08e/8964378042.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b327debd72---97110770422.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/buvubagesemuxanaj.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gigesetagezura.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/kewanozezew.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338bc97c61c---kemitewigisoderowodilewu.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/rujebumasakuram.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/tanirifajejop.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9a5885782---55941387226.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/tovezapezokif.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/77278129408.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161391e8a09ae8---borokeluzapulikev.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/jatemijinofig.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/18017431231.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/mituwigakolelosakazogig.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/roxaganexi.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/39084804878.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/67420124831.pdfIn PDF document text
    • http://mamitobe.ru/files/file/26279308997.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/44990489960.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/53311677387.pdfIn PDF document text
    • http://packturf.fr/files/83613314642.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_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 19320 bytes
SHA-256: 256db0f881cf95043df729c2d6ebc5f77cb02fd6ced961e07b1f02dec215d87c
font_01_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 10612 bytes
SHA-256: 6c9c1b455fb13d36de10ed3d0759d322d9d632fc8160aaaced65d9a203f9d2ba
font_02_sfnt_off00011c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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