Malicious PDF — malware analysis report

Static analysis result for SHA-256 467767e415d57c1d…

MALICIOUS

PDF

79.5 KB Created: 2021-08-01 05:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 35266b092fb76bc458f3f00b52821daa SHA-1: f1bac166e0ce5d3e34abdd865b10e0f6732f000b SHA-256: 467767e415d57c1dc8bcff4d1b8e3c111b93e712fb1bf6d4cbf989158f194363
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e3c313a2d---28429386458.pdf In PDF document text
    • http://brette-animation.com/userfiles/file/65953671148.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e287f156b---foginepuwutofirita.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/rfpmguh853qokaj5dpagc35b39/16942662929.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/gapazovoxuxibuwekavagu.pdfIn PDF document text
    • http://soles2walk.cz/data/file/40730525241.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f0b1862f3---lamazowixaziset.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf73701eb28---xikolesoxusep.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/sunebevopepatigaxifawus.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/wewagoguwovakaguvami.pdfIn PDF document text
    • http://alptw.com/images/files/dibosusabobewaj.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ba457747f---zimumeluzegavefo.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/67091497920.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/12382152416.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/qlmpi4soe6f06qqf2kir74bgb4/pilinorajijizapapazife.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/8688507557.pdfIn PDF document text
    • https://digireg.dk/upload/15573629278.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e1cb9f3d2a9---37699422197.pdfIn PDF document text
    • https://tepihtrava.rs//files/78357265794.pdfIn PDF document text
    • https://ivanamihic.com//files/1857372476.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/lsmoan19lcg24dsmd6fcpbdp31/razolenigegawuwitowupose.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1d8635ce---74025329939.pdfIn PDF document text
    • http://medica-brno.com/files/82081210711.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941468e4a81---setuxifugupuxugepuwe.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f53976269b---liwekuwavezinowef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=free+printable+handwriting+practice+paper+for+kindergartenPDF 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_off0000d2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E4 16424 bytes
SHA-256: c69e00a76c426db6275cf9d0c5cdc3f59646ac95352b95cbfc9d6297a3ebbdd1
font_01_sfnt_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 11028 bytes
SHA-256: 292cdca4df914e8b10ec720540b813d9f6f75d05926dd36f2903963a95c0a712
font_02_sfnt_off000116c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1