Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f518fc681ee3c7…

MALICIOUS

PDF

89.1 KB Created: 2021-07-30 18:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 81972129f71dc11bbe00b4ad996c034b SHA-1: ca2b3bfc20ca0dd8446532c5b4db5b71bc93cb9b SHA-256: 07f518fc681ee3c7aca242144bf0a9a6cc9e43a52c5a38410eb4c3145034e31b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress upload storage and disposable hosting, indicating a link farm or phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://grandviewheightsalumni.com/clients/79364/File/dozomukusajoreza.pdf In PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/7523759673.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/ebf4576b7c236dab71f47105ae3591d6/78323629913.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f17404652---zemeda.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/82526293164.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/89156471269.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/93712248400.pdfIn PDF document text
    • http://moodyhighclassof70reunion.com/clients/2/24/24f6aee67edc386a60746049a176a33b/File/36181106900.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/25888427763.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/zazuki.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/29564180026.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46ebf111f0---77867349238.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/kelipofarubiwovorakegila.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098a19b62724---nezapafufomi.pdfIn PDF document text
    • http://texmet.pl/userimages/file/kopapawado.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/bpmob485v4s3ar0o8bekrk4226/pilifugezupat.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/585920d2b1bc2ff57dccc667e50cc068/jabofe.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/10143370976.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/2af37681fd10c160eb8edb3032d5b8e7/4493416159.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/15454010683.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/35171447957.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/96590942462.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/458cdd8237eb158842809b37651c7fdc/lekuwajejelufuvufopixazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=what+are+the+three+elements+of+poetryPDF 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_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 10640 bytes
SHA-256: 0cfb49d423a3e6dd5d02bde28a0e333e1b1c6450c329da4fdc25bd3a5c7dbbf0
font_01_sfnt_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 17008 bytes
SHA-256: 36efb671946f67134148623e8016d3b281c701aa23a7592b21c2d1927b295301
font_02_sfnt_off00013c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1