Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b84eceeac65bbe…

MALICIOUS

PDF

320.5 KB Created: 2021-06-29 10:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a211b7688840dfb4fd35e7d48d140add SHA-1: f04bf2a8dd57b409044c806b752e0447a1798b82 SHA-256: 72b84eceeac65bbee1dc25cf10dc4a66ae778509938c10774cbb86651e8f4333
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The presence of a link farm pointing to compromised WordPress upload storage and an SEO redirector suggests an attempt to disguise malicious links. Although no scripts were extracted, the PDF structure and associated URLs indicate a phishing attack pattern, likely attempting to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://www.siscbolivia.com/admin/uploaded/fck/file/watusulosivovujejomizosi.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/46d9fefc6e6f116aa9ca68a61faef741/falezamemudo.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/letupofejutaxil.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/dewelifisafedemuna.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991d5969db7---46227222869.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44b0d45fea---joxuxibepojajuz.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/paj9m6c10o00593sk4uk0setr0/70237000903.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/6kou4ifn9fmdb7thhqavbjpe00/32461143354.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfed1376ad---dogaro.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b861q4s2kmvusenoorqeoqtp94/34798080974.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/feab25177613b7478c71b203f559d11d/21438951094.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607911f614d77---77150842008.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/j0n4g70fa9omm05acur9pacf18/nelurutudamidupuvule.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/3tlphemhof9vav0f36gq685ic4/bodotoxigekugeropuwulodu.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/vusariv.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/29d652ee6ae1f7e3ff03d97dfeedad0d/37404906638.pdfIn PDF document text
    • https://aaaxxion.info/images/file/58966010996.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2df3306ab---91067654691.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16081230386edc---29896638551.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/35314604310.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/8745ce25d08326b239df5136888dc947/19756970595.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14964e2d1---15553067480.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/45b33972391ce1a229e84264e39ad501/17556457555.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=computer+networking+a+top+down+approach+5th+edition+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_off00048650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48650 11296 bytes
SHA-256: add5a66c88bfc8d9b806279b01f7982f59df18c9a6a4377628d850ba50c0e99d
font_01_sfnt_off0004a096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A096 22296 bytes
SHA-256: 383a53082149b16fc70fc3502cff0b050ccd5f60e184427646356f032d4da935
font_02_sfnt_off0004d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1