Malicious PDF — malware analysis report

Static analysis result for SHA-256 4512ec9148424522…

MALICIOUS

PDF

88.8 KB Created: 2021-07-20 23:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9c6df7205687a1c0ec23b7d055ad282c SHA-1: 66700d7db9a664b57daba1b3e6868d7ba67f1769 SHA-256: 4512ec91484245228f8677e4c226957e9e126729ab65913a2ed92a39869d50c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate an attempt to exploit users through deceptive web traffic, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/bb571310583e87c0773b8949f90129a8/41092284237.pdf In PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/i1ennh2hd7hj9c3n2j51b1d1bd/demoba.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a749dcee96d---43786948705.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/733957495.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32541f4e3---48054879882.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/73dcf473bccab71abc85657e460eef77/jizosuwuxisir.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/56083925750.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/94f0b1d816c0cd2d0d61a3d9bc25d93e/dirufefemuxumulov.pdfIn PDF document text
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/50676091777.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/138e34a08044c87e7dc82ab6b6cc2c28/24559438585.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/86370596040.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210522235950959.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/qidot0ueb03j7u0fb0i8sapbec/39674597350.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/38833824025.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/62166496189.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160848d5758273---51748731431.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a18c9e431ed---48964743704.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/79265880123.pdfIn PDF document text
    • https://micsys.in/userfiles/file/jazozikaxeluvapafitisage.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/5686253ef5c7e91fb36a8027c496697a/86859106430.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609018acb6aea---jevevivid.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa5ff759bf---zajakibupowawutevusa.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/11498032193.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/npq6j54a5kb20u5md6hnuor288/tafepipebas.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/601fc985e38bfd7092a01050c1cb6b81/dexeluratetixutinazadola.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc40532ded---14287291960.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6311780e2---42231015031.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/zazulurotedizuraz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=stakeholders+meaning+in+marathiPDF 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_off0000e292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE292 10860 bytes
SHA-256: 4df31fd33af48adcd7a6975c5def596e165b45de5784296f9ef0c688f851e230
font_01_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 17936 bytes
SHA-256: 6e9a29ca16a5754ff559269530d5b4d78500de4f0a4a3b0dd58c50fc4d2a4123
font_02_sfnt_off000129ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FF 5140 bytes
SHA-256: 3c74b2d2a6319dca7ff23fa8d7560d134e9ade35c25683575ff8772b885c307c
font_03_sfnt_off00013ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1