Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3a505b9e7e2f72…

MALICIOUS

PDF

88.0 KB Created: 2021-07-13 18:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6a0e000b1417fb77e30d982b9a02c0b7 SHA-1: 086432e1fae9f0e565aca6d52975726b05286c37 SHA-256: 5e3a505b9e7e2f72eedd217d4766fff242651301162da2a4ce9a50e74594ad91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0191527701---zorizokaramawuladesoj.pdf In PDF document text
    • http://acrclubinversores.com/files/galeria/files/99254254252.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076ade0d97ce---suxugitogeb.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/92738d63cd9ff986f3a718bbb65a9bdc/wesozumevizajobenadulodo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160e27fd725328---sobilemumolud.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210619161250.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7aba8060fd---fexezitonufoteligut.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/62959407074.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d43e96c9cbfab2439bd81fe29766b485/40412012844.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae29e4cdc5---84680685531.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/fefekovowogepanixode.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/76751941938.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/fifajopoderejavufamu.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/kkt8ad4m87nvi19j2lfv9ckcg4/xemeruzugusaxurajojivurir.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/f74a47f124f996f2637354730c7bca7b/87984546512.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/959e019488b4fdbdfe4a8474d1d4755b/62332663474.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/a0549e49f249ee1014d8e134c29c4e49/89644711719.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/redozoxaxanoxaraniru.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/nawiv.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8feb37b5---94805248179.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fb869ba290d169b32d461b03471676a8/jowaj.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b440732bc03---zugulij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=vitamin+c+abortion+how+long+does+it+takePDF 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_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 16764 bytes
SHA-256: 3862825e07f7766fba618e9f9edaed7b57f93da314f31885cdc7347d499d2b95
font_01_sfnt_off00012105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12105 11104 bytes
SHA-256: 212d8a758c23866609721bdc0ae114c0bd7fe8e6c70444bcc875ce34bd4278c9
font_02_sfnt_off00013a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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