Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6784c6ac02b170c…

MALICIOUS

PDF

72.3 KB Created: 2021-09-17 10:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 45bde78dc1663b00008d76cf81c1a043 SHA-1: c8b55bc88aa5b323a2a378abe600f912e7e3e55c SHA-256: d6784c6ac02b170c50269337014f547cf7ac73285bf0a71cf309c0ed3fac8cff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript and a large number of external URIs, many of which are part of a link farm. These links point to various domains, some of which are hosted on compromised CMS upload storage or appear to be disposable hosting, suggesting a phishing or content-luring scheme. The embedded JavaScript likely facilitates the redirection or obfuscation of the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=house+of+sand+and+fog+123movies PDF link annotation
    • http://leasingtowers.com/ckfinder/userfiles/files/46288499732.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/sakimuvopoxupetaf.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/33443841363.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/kebitaxupul.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ae47efc40---rujedefa.pdfIn PDF document text
    • http://ladna.pl/user_images/file/23824758053.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/likesoperewa.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/13789272038.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/73hd3od3vkqmmmtmg6hg6l124r/66894015673.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/65637938528.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c83d465b0a76fa6bace7d3f8160a109a/7268208121.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/61652297591.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384fdd993b6---faxuzixudateludovubigefuw.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/leronapurapunoxevibanago.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/41043709124.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/2222757964.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/44923220434.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210916024614_kb9eh7.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/darot.pdfIn PDF document text
    • http://strahyi.ru/images/file/13588416736.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/rajosijezuponipuvolejapug.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/luvimezere.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/gaxatufumodoxi.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_off0000b7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 10956 bytes
SHA-256: 84f6176ea04b8935506f920cdb936017181e1e6f8b23619bcf7b6fd4edd175bd
font_02_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 16768 bytes
SHA-256: 9c2738a28d527a512a36386cb3606374ad5e9f6bb8e11c7ab2983f453621548d

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