Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9f795e5a0d035f…

MALICIOUS

PDF

75.4 KB Created: 2021-06-12 10:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 76dedcd3d0360505d66ca741bcad9102 SHA-1: cf69535d84aaacc25d5afb7d956aa2947ce07299 SHA-256: 6b9f795e5a0d035f4e3c542b5dd1d364539147571066b23b7af8488446606b5c
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or trojan delivery mechanism. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=best+pdf+reader+in+android PDF link annotation
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/b10a6fc8f296787e8de02998d0d4c5c8/32545939437.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16095fd92807cd---47067868335.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728ff9d66db---79748220029.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/foxikonijabuwut.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5bc000ba7---ririjilulox.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcefd92d4---votenadobimof.pdfIn PDF document text
    • http://apvn.info/userfiles/file/11267149402.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30e318e62---tufesetebunixuvowamamuz.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/43164523862.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/602cffb9608d940a87d2112a1843a78c/katemiwuriraguduzid.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/8t1ijpjqtk2jslqf2vjutq30cc/79358699547.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/7353893396.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608707fcb809a---58424912723.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cee9dd550---meginodibogawuxalike.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/dulap.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c15f9151b1b0024ca62c3f7ac77b81c5/74846516032.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file/%5C/77685021885.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082ba2feef06---jijib.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/379b26b71e75e7f20cf1e9b507678c2d/finilupurolinebepakuxelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 5052 bytes
SHA-256: e1831f4e96c7091310539bed3a0b228ab50bcd43d2837f36e816176968ab92ac
font_01_sfnt_off0000f8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 11784 bytes
SHA-256: 6049baa24f6523d108fd74833615f595f840639cb8bd142eb2c3bb5e53147286

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