Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba60943a300a6b7…

MALICIOUS

PDF

67.0 KB Created: 2021-09-11 01:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4df47c16d619e715a0a55c4ffd098f66 SHA-1: e564c2dcf95fd7a09a05dae0306f9b008aca34f6 SHA-256: dba60943a300a6b795efb0e30fa461907805a67b6219bbb6bbad298eb043c23c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to external, potentially malicious sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pixomot.ru/uplcv?utm_term=d%26d+beyond+fillable+character+sheet PDF link annotation
    • https://www.htlexpress.com/ckfinder/userfiles/files/60470729620.pdfIn PDF document text
    • http://change4best.ru/upload/file/wifenovagunumumetaro.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/38000552660.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/70046234753.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/xifafutojetap.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/durujiviwo.pdfIn PDF document text
    • https://ijp2.com/contents/files/kujepola.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/60629944370.pdfIn PDF document text
    • http://artediapharma.com/upload/files/17467798725.pdfIn PDF document text
    • https://mmtours.si/uploads/xitikoxe.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/13105706665.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/58116489181.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/56472240143.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/wasup.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/496147225.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/419256479.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/73a951c1fbbd1e8335c764712c77fadf/lanuzokop.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130961ecfe24---61464816885.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/97396211567.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/bc8930f5fb38c5a6dc4ee628ac17e3fa/1108013146.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/4746013117.pdfIn PDF document text
    • http://czyxchem.com/upload/files/jolujamitiw.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/69381918769.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137288ed5ec6---85251855963.pdfIn PDF document text
    • 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_off0000b03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84C 14376 bytes
SHA-256: 4793cd6df0ec03051b44e3e0a8d10ad9262949e55ad1427031ee68a67ac94883
font_02_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8