Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebacd09b8894623b…

MALICIOUS

PDF

89.1 KB Created: 2021-06-26 19:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b01cb3ccb4778be63dadc7170c9239ab SHA-1: dcac05a292a6d0d5990d3e5ac154f891256f6fcf SHA-256: ebacd09b8894623b01f880d3af9904cd2a3f3121dbd7d11024567c58751398fc
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 a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://chandigarhdatarecovery.com/files/file/36131871741.pdf In PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/68024569449.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/40bc6213b8b21bbad0bf08b46b90e835/63218343450.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/d266219585eccc101de9a71f2dc7aa57/xepifivevarezud.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607daf03f16b5---45199572327.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/dudufagaxotepifivowaveker.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160abf7bfd49cf---92440303392.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077638f65a1c---nimatamewegonajukazatafa.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1720ae383---sabazikifavuvamuxilap.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2534c2978b---31079089547.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/uehmonqidoc0qbj67qcsbhepoa/xerosalajug.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/77965276090.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a947596c78f---20663562473.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5396bb4c5622738cf86bca7d2ec2f3d0/26411610580.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/5afvrbhvre122g964q45u542n7/18440356388.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/p4rcb85jb2i57d60a7u565rhf4/zirenegosawifapuravaf.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/5724307637.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/xowaxukigat.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/89504254381.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fb231ef97---54536491378.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/36189378445.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083170f5a1ef---76371728173.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b26ddfcbf4ad71ba4592ff3c8a5ec6e/delukasepivobodokure.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2f1706761c4507ffb9d13ee513ae41d5/97396415838.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d01eabc70b---xikasofotezej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=a+complete+dictionary+of+synonyms+and+antonyms+pdfPDF 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_off0000f63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63E 17532 bytes
SHA-256: f44bdd45bfd04592901cbac549d776bfda8c9334ed578790696a9d4f4509903a
font_01_sfnt_off00012390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12390 10876 bytes
SHA-256: dc88e6a7de455ff01e8b99e18f5ee08b42c1fb6093d3865f500119fc83839e63
font_02_sfnt_off00013cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1