Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee193d2c7a53cb4e…

MALICIOUS

PDF

90.4 KB Created: 2021-09-23 11:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bbcbbb78571735bff31f8b24ae556aad SHA-1: 31a94690243e9d8ac709280b9c383fd2047e2c9c SHA-256: ee193d2c7a53cb4e2cfa22e03cc035ab155af03572705f6f036d189455dad5ba
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised CMS upload locations, likely for phishing or malware distribution. The presence of numerous external URLs, many hosted on potentially compromised sites, reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdaa21448e---fedajewatogawawugof.pdf In PDF document text
    • http://inarchengineering.it/userfiles/files/dorofepawos.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/vigorin.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/xevonukesijadepanezuxe.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b666d724d6---64135553661.pdfIn PDF document text
    • http://mayjack.com/upload/files/sopuru.pdfIn PDF document text
    • https://photofetimages.com/82309296501.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/17540698331.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/xarexobe.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/4j40lol3jspbfrvk04u268il62/xirigupar.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/21064419125.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/rovufuvifarobenof.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/lakev.pdfIn PDF document text
    • https://soechi.net/userfiles/file/65192231328.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2c72ada57edd86c9148eace35b985957/76575884108.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/92553348729.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/kevamaga.pdfIn PDF document text
    • http://vswet.ru/f/tasobezalubajupupe.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/pobafuwevixilivobu.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/bitepoxubasiripaxovilapo.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/sukefilibobabev.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/dixozigelowabosinuxofo.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/27541735030.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/23793481082.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/6d4288b3366cd48c280be3eb134a90ea/50231956283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=seo+keyword+research+tool+freePDF 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_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 17700 bytes
SHA-256: 782c965899c23d540062dffdc1c38d9866c8f5ac078d808075b6486f2d1765e7
font_01_sfnt_off00012a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6C 10744 bytes
SHA-256: 42690f400693b33009e601abd21d55dee10db07525de123113a00af4f4ef69a7
font_02_sfnt_off00014367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14367 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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