Malicious PDF — malware analysis report

Static analysis result for SHA-256 7382e2225c61914a…

MALICIOUS

PDF

90.9 KB Created: 2021-09-07 04:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 196eef53c40947aecdf50289bcc2aa56 SHA-1: ce2affac51b0689362e76cebdb06fa93ce916d59 SHA-256: 7382e2225c61914a555922ad5608c39bf3c9aa4bf4aaf95a1389eb5b861348e0
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, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and links to compromised WordPress upload storage, indicating a likely phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://chcial.ru/uplcv?utm_term=multiverse+theory+pdf PDF link annotation
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/0a26ab07a4053328a6e881ce3f0b94cd/45784377138.pdfIn PDF document text
    • http://rhondachem.com/d/files/xewokabejo.pdfIn PDF document text
    • https://tepihtrava.rs//files/volarivozovesar.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160e27c6e592c0---zizepatufabika.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/xujuvixokutejenij.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/64c528853f7143b2b6abe7b1a989602b/xanevuvileruwupi.pdfIn PDF document text
    • https://nada70.org/userfiles/file/tawudobugegosenomopaxili.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/tubukakevu.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8d12f1e91---vapuxatezulop.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/sufovulad.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813fc922915---rukitugafanegasajodere.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72772becd2---fexisenuvikutiji.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/divexagigepagogudebivux.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/xesune.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a361ffc3307---zewuvuguxinojusevad.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/79347328209.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160bf98ea3e535---walogupizikulidakonuruvad.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/33527322949.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/2913458849.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e8cbd16d1---potomesepalonugalowaxox.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/kulajuvekinu.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fdc0cdf32---lenagulepigimijof.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/d53325kpjpikc2pkbdvdq13lqt/xikupujuximu.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/65410443009.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/9bbf1750886245b6a71420acd714c1f4/39053848117.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097a0d0212eb---rituwutarasu.pdfIn PDF document text
    • http://healthywithhart.com/res/file/wujitataxuresojipawamad.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_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 10600 bytes
SHA-256: 8b95d73b5bbb06f81b504b99d288b35b07b567e4bac6633de045e50fd04675c6
font_01_sfnt_off000117bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BC 17536 bytes
SHA-256: 10f478e883ff11812ece6f41c937ed8cda8f936dcdd8b964c27161ff4c636f90
font_02_sfnt_off000145c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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