Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf5c84d6355ad3d…

MALICIOUS

PDF

255.1 KB Created: 2021-06-30 21:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 90550a56e59fdf5a6d3999281138c942 SHA-1: f95ba6a951186743a98b960e8516cff6d1ca68db SHA-256: abf5c84d6355ad3d9371f048bc7b87f4702f57edd012806b47d3c37d3e7c7f2e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with a critical ClamAV detection indicating it is a phishing trojan. The heuristics highlight that the PDF link farm points to compromised WordPress upload storage, suggesting a common technique for hosting malicious files. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9251

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=the+capital+of+china PDF link annotation
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160942990be2b5---51752919266.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7ud0eer04896jcidjvs4bu2424/2079061318.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33c6b4d19a---jivuzalazuwuzomesax.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/toxofopiramilunejifu.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbff3459ca---66646076639.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f952cd6f0b---80874411073.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942f8334bde---mozidexunusabonuf.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d936e68e---92307335458.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ec969c61---13920176031.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/sabunovezejuwexikemivonos.pdfIn PDF document text
    • http://holzbau-napetschnig.at/22333576694.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/sr76q9ldqmaru9mjldut6i6oj3/ditifizukedepapa.pdfIn PDF document text
    • http://fygl.net/uploads/file/032028455295.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/oabg20vn50s2om6tl02t2tnkoq/62109422517.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/75664762730.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2674a629d---naduvuponagixazozivi.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/xanazisagisixuxelubiz.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b28270d278---29459782190.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096f23064ef9---matusimapudovibobiwijag.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607539fd3bd08---jamifuxotowedidosulezu.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/wijojigusomip.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/75861e858ed5859f9183b46881cecd76/99501206184.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f9847bdb7---83305017273.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/26105680180.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084db1b710e5---zumubev.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/9565432851.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002cefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEFB 10272 bytes
SHA-256: 5a91f9c6bdd038f3bcdd56e9765531944350e5c5ce0ed530ba8af5738fef5aa7
font_01_sfnt_off0002e606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E606 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002fe17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE17 16100 bytes
SHA-256: 6b54a3f50d1a413a5c8c0ed289a9c866e37e8bd73df0b162fe7132700ce54c18
font_03_sfnt_off00031355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31355 23896 bytes
SHA-256: 1675f4c6649ca9ac801c75d25929126886cf2183ad799a1634dd04dead5b4dc0
font_04_sfnt_off00034e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E16 61396 bytes
SHA-256: f450f514bb3dfe03ff681676b9b8974dfa9436ccdf06576fdbf2211c9f7a5e44

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