Malicious PDF — malware analysis report

Static analysis result for SHA-256 54144ae24c7bf716…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 10:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e36c55adf9000bc96710c61f72891d75 SHA-1: 2e2bafefa7349792087762c26fb0df014bf21920 SHA-256: 54144ae24c7bf7160fdbb17c022268858bfe02f185c6db98710d174a639f1a0d
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute malicious files. The 'SE_PAYMENT_REDIRECT_LURE' heuristic specifically indicates a pattern common in business email compromise attacks, aiming to trick recipients into changing payment details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/7804q5a1kmsvu3ftidoi7pia00/wulabim.pdf In PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803c58adce8---monujatetajesavagewe.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/fakixevopinijoraxotuwib.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076fafd98d4c---55010853734.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf43b2d973---39048419169.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612924ed28cf7---rukixazewomakadaze.pdfIn PDF document text
    • http://chikatere.com/Upload/files/93547143154.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/riputuxilenuf.pdfIn PDF document text
    • https://blokhol.com/upload/files/86609395311.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/89833725162.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/90640170579.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c1470a950---jowevediz.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/40629976700.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/10007785154.pdfIn PDF document text
    • https://kimcert.net/E/file/51773685722.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///pejulokoziferiseminagawif.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/bdabd46411769c1a89d0475aa7c3377a/39939434677.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/49862939898.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/loxitorowiwutanevar.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/folenubokunifopuvikisak.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/22912999021.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=kerala+lottery+result+today+in+pdfPDF 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_off0000ddd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 17760 bytes
SHA-256: eda9736d987c030eea38ca24544af823fbc9a8c1426a2c6b7414225ac6c7ac2e
font_02_sfnt_off0001242d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242D 10696 bytes
SHA-256: e5f7ba5765c56eb3ae7c430a0220f56671f697160295f9084628ef9b34a00787

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