Malicious PDF — malware analysis report

Static analysis result for SHA-256 072784915093e9da…

MALICIOUS

PDF

101.8 KB Created: 2021-09-02 15:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8333d18e7802c0271071502c42f01ed1 SHA-1: 6bd0f4a7b16442a3b3d1589fd2bb447b3db77881 SHA-256: 072784915093e9daf0a783e85782c4f2624618720c5910c2f7fa9b0e798debf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with ClamAV identifying it as a phishing trojan. Although no scripts were directly extracted, the structure and heuristics point towards a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/fqr5752gohauufphl6qn5ube74/tawalibizasizigigudades.pdf In PDF document text
    • http://www.allatpatikapecs.hu/images/file/16881092434.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/zalabewi.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/puwoxi.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/xitip.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/kijuporokotutedurazo.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/riduxaxebuxi.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/63944635844.pdfIn PDF document text
    • http://riph.pl/userfiles/file/82164650904.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/veterenimisusavezuzimaja.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/87672141843.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/2fd5520b043e53eb1133dcfa246ff5ba/69647416800.pdfIn PDF document text
    • http://builderall.info/userfiles/file/27880446656.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caecf368d2b---bidejuk.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16086a5ee63a8d---xeferewavalenuperuxa.pdfIn PDF document text
    • http://fvhs1970.com/clients/876770/File/kalijitevi.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0b01f6fd686eb9b47b8291b61fa41138/14592636352.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a6cf1335e---97540350680.pdfIn PDF document text
    • http://bdn10.cz/files/file/fawuwududoriw.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/97300555498.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/dupixo.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/9b029aa6f91d78a225301ab4dbbec92a/bunagutafazasesiwewepol.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/migidudobiloxamir.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/5g8bc4iasif8ruicmgkbj539o2/banapetejexapa.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/41280365079.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sic+code+list+2017+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_off00012a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14260 10664 bytes
SHA-256: b22f8cd2269f1fe2f624aebe448a955e068b3b65477bc35f1791211b37545b4e
font_02_sfnt_off00015b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B04 17828 bytes
SHA-256: 9c163f44ac75ff86f60a64ff9e841dbd6757a93f978f56ba955b4fb087d038c5