Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce565c0fbeeb73b…

MALICIOUS

PDF

75.7 KB Created: 2021-09-08 11:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 88f1863796a9374daf642fc023092674 SHA-1: a743686e5479185671180292bc7c1b9cb8282bd7 SHA-256: 4ce565c0fbeeb73b4b035dfa47da6cf8870d576756d8a7f7952a255baaceebee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are characteristic of phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • 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 https://philabc.ru/uplcv?utm_term=michael+porter+5+forces+model+for+banking+industry+pdf PDF link annotation
    • http://teplolux72.ru/upload/file/betefufa.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/kokonumogakitug.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/94726146636.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/namizorawetiwanukidatulol.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/3999388870.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32cd03334a---56776479056.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/8635265673.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/gevuruzupuzavoluboloz.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/fazalazasigofimupokuv.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/77893797789.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612102918a919---91722121880.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/b481c194b31c3108c2af952c69c71e32/sujawafav.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/afca1ce913c1125f5efea2f666fab838/sexobas.pdfIn PDF document text
    • https://balustrady-metalik.pl/files/nowitowozamizaxib.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/tulapuloxif.pdfIn PDF document text
    • http://wwsm-us.com/files/file/biwixitu.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609684604dc34---betutulazikuvijir.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/9774k6hrh0rnl97lc886vqg372/wipenorosexilaxor.pdfIn PDF document text
    • https://jslt.site/js/ckfinder/userfiles/files/72329922681.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/15669122346.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5q2qiqgh1jorn67bide75n5co7/68937479759.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/deliwu.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/69a6087dec8051493628d626f2ce7a0b/42042653370.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/49146748125.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/39303706806.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/gorilisetuta.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_off0000c2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B6 11640 bytes
SHA-256: 82f3ee24620cbe7a1bfe415f3687a5a85187da5e2f68ddd9fd8f6f0550fec5f2
font_01_sfnt_off0000dde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 16652 bytes
SHA-256: 929f4384ba614c5c2402bb1a08f0e40f3ea10c8f4f2c39c8413e39a56f06cd58
font_02_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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