Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fea1e0671b25e2f…

MALICIOUS

PDF

75.5 KB Created: 2021-09-03 02:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1dd15dbc12b7693efdb3289e5ecc7e48 SHA-1: 78582ddd648f5644edc24f6fb3ab65346805880c SHA-256: 6fea1e0671b25e2f3b2c617b0149625e717d048d54649802c25496505d55c528
204 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage and disposable hosting, indicating it's designed to redirect users to malicious sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is a pretext for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://all-vehicle.net/js/upload/files/31315438517.pdf In PDF document text
    • http://brlairport.com/images/file/fidiv.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb4f67aed9---79745562787.pdfIn PDF document text
    • https://amblamy.ee/upload/file/93653791577.pdfIn PDF document text
    • https://ancoraeducacion.com/images/11605911.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/79232131553.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/14319225437.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/80134756765.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8c6bcd034---liguzepedadaja.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/sidemefasoxivomamofa.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a19d7a67d0c---63960771185.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/mubofixenujolefij.pdfIn PDF document text
    • https://efnnma.org/files/file/66518836251.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722c812a5ca---masuduk.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/15424759827.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/dokibebugoromarelasewi.pdfIn PDF document text
    • http://mtprospectbaptist.org/clients/7/74/74f10a8404da00fab064704771972c19/File/vuwapodipuxarodunak.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/fapomixelusuduposalo.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/305ef5c5e1e28dc2cee3568f57ffbd13/58251538066.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/birazixopatizipe.pdfIn PDF document text
    • http://kotolantopeni.cz/file/53740687462.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/863c9fb1abb8db2c061591c5c6170956/luzikem.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/m5e1u6l6feodcl4p5s77d2cri7/86975708430.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/voroj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=epf+claim+form+10c+pdfPDF 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_off0000c485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC485 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 10436 bytes
SHA-256: 333778e9fe2f980284dc318a2c64a390571e5c4cf102c8fbf0bf64574a23ff5b
font_02_sfnt_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 17244 bytes
SHA-256: f48b968af21cc38b169b13defef74ac63f10499ec78db2230431913fb244b171