Malicious PDF — malware analysis report

Static analysis result for SHA-256 429ec3b0fedb562e…

MALICIOUS

PDF

84.0 KB Created: 2021-09-02 22:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 51645bc0a852f94b1604a5fbd76e9500 SHA-1: 29a39415a37a78b897b8a2c80edd12c87bda398c SHA-256: 429ec3b0fedb562e9eabae7b49d07242c8d1e7294cd64d165e5bb85782563b2c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, embedding numerous URLs that point to compromised WordPress sites and disposable hosting, likely to distribute phishing content or malware. The presence of external URIs and link farm characteristics strongly suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://catamma.ru/uplcv?utm_term=independencia+y+anexion+a+mexico+horacio+cabezas+pdf PDF link annotation
    • https://bayihoki99.com/contents//files/75971415451.pdfIn PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/winuxaw.pdfIn PDF document text
    • https://agatanorek.com/files/file/kegizezemubisuditeva.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096c2c29fe65---kikuwagijekopegikadozafa.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/wivunos.pdfIn PDF document text
    • http://wonderful-foods.net/userfiles/file/pewegukexajepikapis.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/17264382166.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071facf67652---9532450116.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/5438c355216aa103e85945a130c7ff72/18754700086.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ce2e17abd---92789026470.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210802_145502.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/48147166054.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/cp3gtjekh63ctmk689e0okblt6/pedigukoperuvorivirowuv.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d9b644a9a---48626249009.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160968d5d0b269---jixeretedipowef.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/pisedabavijidexisixapoj.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/pogirilasizomutudusodur.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/gijugiwexudokigo.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/mefar.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/15433445403.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/riwos.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/dffc73c18bbfb7251b98eaa381d65313/diridomujul.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/mefova.pdfIn PDF document text
    • 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_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 19692 bytes
SHA-256: 2e7905917e89bb3beea5d90ca48029c4844fb0dbfa1cc1be7d764a73b69b24df
font_01_sfnt_off000110bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D4 11108 bytes
SHA-256: c85e2fdff078906103a452ff9d24e5195e11b12c61db631796f7f0e401f1ff2d

Open this report in the interactive analyzer, or submit your own file for analysis.