Malicious PDF — malware analysis report

Static analysis result for SHA-256 64eb33baea1e6faf…

MALICIOUS

PDF

103.2 KB Created: 2021-07-07 10:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f572066aa9f1f313ff1928b8b2963e4e SHA-1: 8dfbcf19a4264e3581e506d6531d4a3a19bf84a0 SHA-256: 64eb33baea1e6fafaeef5bb16f72a47870e0b9f0f2ed8a3ade4909b891bc8f6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external URIs and link farms hosted on compromised or disposable domains, suggesting an effort to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://medvor.ru/uplcv?utm_term=nick+young+married PDF link annotation
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/bc196ea1080cdab49f72ce3a41e59eab/godebogifi.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/44913323011.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/16065141279.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609697aa40a04---pororituduni.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cd80c83b4---66713305631.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae98b7c92e---33294493902.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/kesolubovep.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/bavs46fv2vvfuf8frl7cboh0ir/pokex.pdfIn PDF document text
    • http://cartolmania.it/file/xotesoz.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/67302a8cd05e083afae559d3e0b0629a/38465671310.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81a02818ae---45089933708.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/04898d54db24576a6140ba82c3f563d8/limapali.pdfIn PDF document text
    • https://ka-base.no/images_content/file/15556881374.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/kanirulofemete.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/ff8b4f40c3518dd40343bcacdd7a8753/98858443820.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/c7155b3ad7ee8366f2ae6a0843d229bb/tugevubeludulukaziku.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160881d2e641e0---jizexedotafenelekuf.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/75647254942.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/58620052052.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/bapelujusagim.pdfIn PDF document text
    • http://4bx.pl/public/file/fitobikonuraxikafujurer.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/14637023725.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/bumabidol.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/25994741952.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/ccc89b3e67138600814ffd5c646e60fb/25270944336.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_off00013162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13162 10684 bytes
SHA-256: 5c69b3c13b266b2d79e2cf5ad5c4126785b80d6804e3c91bcbf718dd310d0a07
font_01_sfnt_off000149a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A6 17780 bytes
SHA-256: 1ee4745069e48d3f09602cb666aa8715ce8fb0168a3b980896fb17a2f5f665dd
font_02_sfnt_off000177bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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