Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1eda0cd24c2cb0b…

MALICIOUS

PDF

96.2 KB Created: 2021-07-19 04:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 04143e4b74ad8471113862aeb0dac53c SHA-1: 391ae0d4bf5ffb53ab1ed23bcad445675cd5dfdf SHA-256: a1eda0cd24c2cb0b9d77348eefd2e18eec4325f1a46b9265842b5ba3f4b5f900
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. The primary goal appears to be phishing or directing users to further malicious content through these numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbbe6bdfa9---mepixuvepunoris.pdf In PDF document text
    • https://actorconseil.com/files/file/xapuse.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/49110278056.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/46871381596.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/u76a3liu34pstc9b6benanguv4/kejametasinororapozoreso.pdfIn PDF document text
    • http://thaide.org/userfiles/file/99141669974.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/bfc2fef20df463fa89a27ed51a3b4363/26688368069.pdfIn PDF document text
    • https://nattasampun.com/upload/files/54766157450.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/8768133052.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44747ede83---fiximukisewuzokusosiw.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/fefajasijaniwikuxaporofid.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/kuxumenojesivomofobufini.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/20881039897.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d99aab1ac7---zujewevulidasonulexexov.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/36278963800.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ac9bd1586---9412151364.pdfIn PDF document text
    • https://ovalpolycoats.com/media/xopofawiziwutikuwopo.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/23095332406.pdfIn PDF document text
    • http://topstec.com/d/files/53399698801.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf57a56bf0---nesovejutige.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c5638acaa---sefidekozedasura.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16072bab851635---rinanalibizorexime.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/4678dedd2089444d9fc5b5d3deaf3b29/najavatuwilalademan.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/18903940907.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=sovereignty+in+chinaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 9636 bytes
SHA-256: 24553f0fc14b7f82962db939b27467bac9d2aa2f167e94fee6d921113b6540c9
font_01_sfnt_off00011439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4B 19372 bytes
SHA-256: 2555ee0a7b511a2309606288fd29ba5485fda4249db78e8344a12295c962d01f
font_03_sfnt_off00015c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C15 10548 bytes
SHA-256: 68f06e7955696a880c1bc177f835c2eb48209fadfe0e26363ccd0974f0d42405

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