Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8a0c40c216bc22…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 17:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f22ff2b40c1bd3ee6a6bc193effcebc8 SHA-1: e28c0a8973ee607cb91a507e0f97eedba822aa8c SHA-256: 1a8a0c40c216bc22fc7ad1dbd10ab4ef8aedc6b42dd169ac806daa776aaa4ca0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a ClamAV detection and an ML classifier. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and other domains. These links are likely intended to direct users to malicious content or phishing pages, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a355f467ae---72483523501.pdf In PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf53dc78329---nuzukodabelavobapogovi.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/78659037696.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/tujiganobeva.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/4dee2f332a951307f3ea67f7ead362a3/72524890933.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/xozodokijozi.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/nonopolixozexe.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/wozorizogexo.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/5137c42a436accdc60febb749447423d/kikefutolajujenadiwobi.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/11605099582.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/suxigiwalonilaruduna.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1a77a89a---mosuf.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/96072359680.pdfIn PDF document text
    • http://vhktn.at/images/content/files/xofuziw.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16094b5d5e0ec3---75246410843.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/wigeveruzujij.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210818224330.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/70248115648.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/h9mp5bikvnhu2hceirgoiagbsm/tivaxafujidipamununofaf.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/58668149812.pdfIn PDF document text
    • http://ed-union05.ru/files/file/8044635301.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e60c1bbaa---fuwufale.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/rimapijofavuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=isaac+and+moishe+deli+highwoodPDF 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_off0000dd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1E 17864 bytes
SHA-256: 65a0dcb2c1d635972420d37564588aca7e344319d0a98ba795816d2a5170306d
font_01_sfnt_off00010b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B53 10656 bytes
SHA-256: d79bf20e77506ecc1d22200b568f2e50b01ad7a75595596a4e04ba3458d04288
font_02_sfnt_off0001235c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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