Malicious PDF — malware analysis report

Static analysis result for SHA-256 9040e0279229c6ad…

MALICIOUS

PDF

82.8 KB Created: 2021-07-02 12:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 779e1a687d6af4ed526f11c0ac29f7a3 SHA-1: ed06a2e875f54718b1f94a492366b2a39e52a768 SHA-256: 9040e0279229c6adef339ec936a0eba6dafd48937abdad9decd6b55013696050
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of these links and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76c8c46837---nixukonafekabunubigapawav.pdf In PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/e71dea83d6bd3f57686deaaefbf91ca4/78456554659.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/fe3d5ea111ccd0abaf140ad781d4af02/wilojixojotigebewa.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755ba49b27a---89060877216.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/dapumugu.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/zageded.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/90f8ade03ac62fca8935ce324f8dba5c/36062198622.pdfIn PDF document text
    • https://htchninc.com/d/files/93377657736.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/bugame.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e34b167e0---27864124048.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74379b4ee9---dugunaxezab.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f879884f0---mufanabosus.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/29391241479.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/61500301422.pdfIn PDF document text
    • http://beiks.info/public/file/56646194623.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c3f37c490---94322159154.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3248c57952a01fd32117aaa63d919ea0/degumog.pdfIn PDF document text
    • http://praguetransfer.com/files/file/vefenobufazuviko.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/141db6225ae1a581a27e9c0214f5a62e/bidot.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/d1mt43qivr8r6s10cn80963hi4/dujemosabexi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/fa2d727d378c39bea01f9f27b05cff2b/sezaruwifife.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c264f3edd---60481125540.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/jenpmtl5eru94bmaash8ccl4c1/16933439540.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084ffcb3995e---pewutiriditute.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4f3c32749---67211546320.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7d10435da1cd6234133a084222b9acde/kafafapojonava.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733a1bb2a21---xabur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ar+test+answers+for+tangerinePDF 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_off0000e128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE128 17156 bytes
SHA-256: 700d1f0e4000df35de83fce7c24ea2a8ea2703479c11749b1ef9331166f90c8a
font_01_sfnt_off00010dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 10412 bytes
SHA-256: dd84038a977417258bd7cdccca9e5504efa53430ce9cf9062407b8cc36ae80a2
font_02_sfnt_off000125d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1