Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9ba3014663c0ee…

MALICIOUS

PDF

82.6 KB Created: 2021-07-04 22:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: eb6467a21bd0910d215c5eeb2b328cbb SHA-1: 5eaf1e55115296c0bd91e20cde8ac6852b291fe3 SHA-256: 8a9ba3014663c0eef53b3b8d87b7695989d5efccd15b1a545c4d991a31772b6e
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The primary purpose appears to be directing users to potentially malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://yellowstonewildlife.com/20992366591.pdf In PDF document text
    • http://standartbio.com/fckfiles/file/6267837155.pdfIn PDF document text
    • https://ikima.fr/uploads/file/45647347482.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/garufaluzipomuvu.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/1206324125.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/34828654309.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160729c5485366---bazolo.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b08d4b059---40563669595.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/7bgnkobgehsor5srfevhk29936/62236587343.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/lokadepowupobaxofeze.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/wozunemijewi.pdfIn PDF document text
    • https://shidoremicrosys.com/media/35935094972.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/21729186625.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/5a89578724b15a1384a2c896aa4cc5eb/50907957758.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210607064809.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2c18b1060ce20087df89afa6091cfb18/37650433573.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607275326ae4a---54902695107.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/f5fbl9tmener14c7bth8gt71lu/45861209103.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/87951693467.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/or3bfp5vhl5tjomvr5h7eaiadm/sureraxanenejosepedo.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f8310f280200b5032a8f9bacfeb67daa/49318102294.pdfIn PDF document text
    • http://changecn.net/ckupload/files/jamazafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=polychasial+cyme+inflorescencePDF 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_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 10620 bytes
SHA-256: 62ccf4dd2f5722d173cca0ade7b05b4786b172f9f61ec12ab40e377fe115a55b
font_01_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 16108 bytes
SHA-256: b2f8f69c37a7071766e46000740a9ac737df343ba301895f458a44d1c7eb7aca
font_02_sfnt_off0001250a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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