Malicious PDF — malware analysis report

Static analysis result for SHA-256 0986e92c68e5f479…

MALICIOUS

PDF

73.1 KB Created: 2021-07-29 09:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d0d3b8519ceecaf90b2c98de0381fb4c SHA-1: 86fea9fb50d2693f3459986e86ddc0e34d0b2184 SHA-256: 0986e92c68e5f47919e785259ac4e1160a181a53c0635ceca7f1ae4f0178c68f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to what appear to be phishing or compromised websites, suggesting an attempt to redirect the user to malicious content. The presence of a link farm on disposable hosting further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://ketchas.ru/uplcv?utm_term=rewrite+in+negative+form PDF link annotation
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/epqrp8j2i92b1f794gne1p884p/372214328.pdfIn PDF document text
    • http://614move.com/clients/4890/File/5796099825.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/hma1filivv2e1m8ko8q6js79mf/dilobovadikipopu.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/228e47864c08a3188d8c195a24231e58/balesowotarizazobije.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/nudutetomepumogaxosadebez.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ose3phgu5jvpl2o3l5p3l6f9pl/vuradagasuxita.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/fixelogipexalunavilazo.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/89476354117.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/salidiberis.pdfIn PDF document text
    • http://broadmoor80.com/clients/866172/File/86873101867.pdfIn PDF document text
    • http://guchenes.com/d/files/88915451531.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/nezerowaxusig.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/60930613564.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/zamititumavemedoze.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/963d67da8b65c37eebe2c64119b367c5/sufesegoxabulaje.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075c86044c48---94486769287.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/39526364051.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/6q1g8hqpj4p506j83lfa540i0r/12838878049.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/950f850f5713c57959b5d7826eda80b0/peded.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/79898751668.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/bofozutorevagifexamuzi.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/poxut.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_off0000bc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC21 16852 bytes
SHA-256: ecfeefee6103c9148f510357889d3a640f4b241ebc49b26ea5562ed8f99d785d
font_01_sfnt_off0000e6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 10540 bytes
SHA-256: 7da251080bcac32ff0a9fee52ed8d417407957fe2261aa4f60c5ef5626b9c314
font_02_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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