Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b06c7af4fcd287d…

MALICIOUS

PDF

64.3 KB Created: 2021-07-02 07:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 46d542edfaab2d451e11c336f9f35e89 SHA-1: d973a4d84b37f90800afc34c44cc8904e4c14c31 SHA-256: 7b06c7af4fcd287de876a758c38ca3095c9d4a19cdf404eef8ab2d641b079177
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, and the document body was unreadable, but the heuristic findings strongly suggest a malicious link-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6720

Heuristics 5

  • 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
  • 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://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160827c8531951---bafakovuteferofizofarof.pdf In PDF document text
    • http://3dtechgroup.com/uploads/image/files/vatebozidoredopamo.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/62191034dd874b97ab5a66850b020455/78832117355.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/g73pec38kf421b7gpvgcc6om3k/ranapupesino.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f9ec5b4df---xamuwejaga.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8eda62388---47705743590.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b647d29ea03---bugorapepenot.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/12564912226.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc299fe2c---bubilawej.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/effe0dd964a43e209bc8e3ebaecac0dc/gupizevilimikudazufotep.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/difujozopulojudekok.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/9ec5668eaa799ca9039fa2225994e137/2752204723.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/noniwawibika.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075bebf07e39---63782942045.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0fa354cd8---waviv.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3bu6ocnv0hve1c07kqk26a0uqa/30854846425.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/85001371379.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f30a38dab3b4074b3ac494b48ba1e8bc/30718236417.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/0ad290f40bbfa7d79cfb8b6734285c90/bivumaluzuditopawika.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/0g9io73le1skodc9ah5kvj1ve0/23176424710.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kuwodazomilemojowewofarav.pdfIn PDF document text
    • https://triosms.com/userfiles/file/fexogub.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/84021530583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=about+benzoic+acidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD242 16040 bytes
SHA-256: 5ab114f1ee01e020b704cd8e0605cb083de6912fe0bdd7c29e01a21c227bfc8e