Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee490c0cab2740ac…

MALICIOUS

PDF

93.9 KB Created: 2021-07-03 05:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e712befda080223df27303e24ba7fde8 SHA-1: 240760f5ca302cac1d0591712e41137a01da46b6 SHA-256: ee490c0cab2740acd343be0e7d6cf1435965b8eb9827b632f5a9f21733fde464
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics suggests the document is designed to leverage these compromised sites for malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9b81c637900b33db18d253e9dc1c6d41/87323969159.pdf In PDF document text
    • http://amuseonline.com/absite/userfiles/file/sitolefenixugubuxoleganun.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2eee03bb2187ccf3e16f334a434186c3/84589139576.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/213f052978763cf8566dbe690589cb02/47180829976.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/faa3jqeu8qnfjqq83th8ir51fn/94509468410.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///20216231745461686.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/67fh3u1sq420fo69nahmhhfhl2/lizobolat.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/27958431073.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/7e009bf35dbfa91ecb36f76cd3941d70/nejatapubesulule.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/440fd3f42532dc1c3baa46c233d01c50/saduxaxavivuduvixeziseler.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/kle9r5ueg6vr713c7ab2u6b6nn/nugokepitijofenod.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/33f65fd542a5baf949ab1324eab235ca/koroxexi.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ca5d2e2fe---72459609829.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/59647984345.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2qsnnmsa1646j512tjk9f22rg5/73403104878.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608010b39f299---58763125894.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d463075eca---54729966810.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae6fba5bcf---tulamevoxanaj.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/bepodovekawamamo.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/63244277569.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/xinumaporuxidanorebuvijeb.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608988bb85952---rorimesuwigaxinoxelid.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/99153171139.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/e4e91573f62b687388503c20802d839e/82214905987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+diffuse+your+curly+hairPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B67 17520 bytes
SHA-256: b09538b4a8a965b4d76e0a2e4e0853202d05c25918504f42911a8cd6cb08e7e9
font_01_sfnt_off0001393b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15152 10760 bytes
SHA-256: 3113face37e5970c38b60189f2ab9c565e508be8786d7ad32d272521d748e9a7

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