Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed926a2ba14eed74…

MALICIOUS

PDF

87.1 KB Created: 2021-07-14 01:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f289421cfdbf7b28f721cc31fbc28d57 SHA-1: f6495efe0dde599d6d662c257b4957268cc5eb7a SHA-256: ed926a2ba14eed743f152a9a52447c79eb972eaf0fcefa722aa3d9addeb70a5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary purpose appears to be directing users to these compromised sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/d8e3e6a4e816c9dc2c94ff9db2046611/3043225475.pdf In PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/91484806439.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/59472741540.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/62041513864.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/46767891398.pdfIn PDF document text
    • https://vestol.bg/files/file/jepogapesatazodiv.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd388a29b6---730398620.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/75738699638.pdfIn PDF document text
    • http://simonide.org/userfiles/file/51060488906.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/382f3f038947889808828b69a9ad74cf/97391416081.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/xubat.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f295cedf89---28870538327.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/d49ce4768b30ac20acb42c74fc83535a/97209961187.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/90197605403.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/geini3dor113laides0vh86545/dizasid.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/95e8ad9d1aa34f219f26a774ae9b94b7/jebaxovigujidukefaku.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/vfs7s5agne44kqvjme6fdf0i7e/vogijazitilidibajulisurow.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fijg8hiha3g1all77vtpb4cah2/zuwegavipawuvezo.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/49491318316.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4199b3aca9---95869001266.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/rusujogubotepurena.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/9b365e6602969ec2ed2648e7457fb6ef/sanokuguk.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608d699e3a140---wopunorupasavux.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/uh3k8bnjpbv87rd3f384o7poaa/fuxevexubibibijanoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=current+space+missions+2020PDF 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_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 17572 bytes
SHA-256: 7337436c9c0067c1c6ef1a99ddcfc526e4bfaccca4d30f4fa9997d5702018529
font_01_sfnt_off00011ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13604 10860 bytes
SHA-256: 8d26c728fd09170f04643e93453207db5e66baa738014a5da9ed07ffeb2bb993

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