Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b4593aedc37072…

MALICIOUS

PDF

82.1 KB Created: 2021-08-06 14:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 839e4f370cedd17808be8bd2dd1d13ae SHA-1: 2bdb5e10cde7d295955c4d5482abb20a55ec54b8 SHA-256: 67b4593aedc370729caea0e9ea8eeb1bd7fd72f42d85940495205d44b7a8f510
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/243277d51c67f13362c0635119040e7f/xamiroros.pdf In PDF document text
    • https://anduong-nhatthanh.com/uploads/news_file/jepikegilalulabep.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d218ee667---54575094723.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/1oa5kgukl1m5cib5rgba6q3bo6/4076393237.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a462ac033f---fujezuvarafeponoxojunuv.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/71482597940.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/43296862856.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/3d3244657f09502b3dcb236b0fd8a22a/kubenasomemufupetog.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e1218fb4a9c---jiropopazuvopemeve.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/83559627810.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2acdcef80---87385330818.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6411109a2a---mobuzulixegunorezapadaw.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/39581414217.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839e7d1d2e8---jejeluwu.pdfIn PDF document text
    • https://topupdana.com/contents//files/saruwapovuno.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/17897488967.pdfIn PDF document text
    • http://geraldinekilkelly.ie/80456981316.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/sajuxezit.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/cadbee0f4c670b65b3940ba5415175ad/pujipe.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/zefekurubulawuvax.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/72515836021.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bc03d343bcc---fesozugabuzibidefugotaz.pdfIn PDF document text
    • https://airshow-bg.com/file/97719244612.pdfIn PDF document text
    • http://parentini.it/userfiles/files/luzade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=allworx+phone+manual+verge+9312PDF 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_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 15920 bytes
SHA-256: 0c338d5557da0f2b9a3e7fb85d3f47eb0a68ecce37b364c8c23b2a65fcf3ef9c
font_01_sfnt_off00010817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10817 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001202e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202E 11188 bytes
SHA-256: 1c99b60c11b0bede26e42a5b2a3d16f7facc918fbc1986c8a2459dd95c12ab52