Malicious PDF — malware analysis report

Static analysis result for SHA-256 3319108c04966e3a…

MALICIOUS

PDF

74.1 KB Created: 2021-07-30 00:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9daaa47cd0e4f57c894fca02dbf51173 SHA-1: 9703d61d4abd802d42f929c01281cf2634c14053 SHA-256: 3319108c04966e3a736ede7ae3ed2c02401929857566c7cc75ff3c8dc8209645
124 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various websites. Several of these URLs are hosted on compromised CMS platforms or disposable domains, indicating a likely attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3885

Heuristics 5

  • 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
  • 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://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/96243959913.pdf In PDF document text
    • https://zemiigori.com/uploads/file/25466666325.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/suputerunusovinekifal.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1626204628.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/dupuba.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/94351974464.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/1039092832.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd4a613a9---gegimudore.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/sadeferasox.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/81209247939.pdfIn PDF document text
    • https://o-dance.com/upload/files/monorabedazega.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/14970756601.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/e41895a690766f869cb14a7ca25cde05/lizitatejakikewe.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160caea4099978---25254975115.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/jatubuganumugofiluzado.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-20/20210620110352221008.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0bc74f19---26672285521.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ad97e10763e0b6f1bbe81c16bcfead2c/68414306537.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/16261569376.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8ab5f9cdb9e07e8cf0a97a8b761f6d60/mapagimak.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/gokil.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828c3de7601---2730452835.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a09fc9f1037---tozekakulon.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/sofopawagijorex.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088d634d1c2d---44716973508.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/99846442157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=kitchenaid+professional+600+mixer+parts+diagramPDF 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_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 11452 bytes
SHA-256: 6623ee583c73e2d7a81ec383e833240de1a41ba159a51a2bb862f6cde7805be0
font_01_sfnt_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1