Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeacefc28c7d867…

MALICIOUS

PDF

82.5 KB Created: 2021-10-25 13:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5967f82787a14950256900785bfc8d6b SHA-1: 67180cf2dffec18ef196dceb3c34cf358d655c17 SHA-256: edeacefc28c7d867838ab1ab07d5e3d103edd052a511dbb2cce82e17602c2788
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://zawodydrwali.pl/app/webroot/userfiles/file/jegufedudodixok.pdf In PDF document text
    • https://crawfordpoint-ca.seeninherd.com/files/17430216348.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/vigiradagakakoxetijez.pdfIn PDF document text
    • https://domilot.com/uploader/files/tudil.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/20896952714.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1615b4d360f51c---birazezonikaxedukukafigav.pdfIn PDF document text
    • http://unite-chem.com/upload/files/gijaxetixilagapadejafexe.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/kesujid.pdfIn PDF document text
    • http://annabarons.lv/files/files/63965165034.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109170751351284.pdfIn PDF document text
    • https://worldtradezone.com/userfiles/file/xovudukeja.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/penifime.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/97829475576.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/gudeguzepamofev.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/zibedimepu.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202108312121239101.pdfIn PDF document text
    • https://gilbertems.com/videos/file/85431721072.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614ef082a4966---logefogizevugupovene.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/90333006864.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/98125021415.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/34397032818.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/77668975768.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16141d4613a9e6---nisabemasi.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/bubaxusutukegarefoma.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/6Zflnl449io/uplcv?utm_term=taste+buds+on+the+tonguePDF 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_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 17272 bytes
SHA-256: d92a4e4cd62df2cd167484413c3138cf971e2d09dd62f591729c1f4f2fc6cde7
font_01_sfnt_off00010c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C77 10492 bytes
SHA-256: e509c001de4ca6019ba3e2c04bb282aec239e78aa0b3235c6de668a609f094db
font_02_sfnt_off00012415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12415 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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