Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bfc1269c700ce4…

MALICIOUS

PDF

79.9 KB Created: 2021-09-05 18:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a8cf6ec52b46c481eb008d50d5cb2611 SHA-1: f458032067cedaf395876c9f7dbe853bcd470311 SHA-256: 19bfc1269c700ce4f3911861df3aeae1baa9c476963cda4a58c49337d1f73605
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users. Heuristics suggest this is a phishing or malware distribution lure. ClamAV detection and ML classification confirm its malicious nature, likely exploiting PDF vulnerabilities to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=i+love+pdf+pdf+para+word PDF link annotation
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612e2a190f2ca---76645193726.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/lodalam.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098433d4169d---14804214923.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/mazunix.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/167638693.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/wosovi.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/mubetubukaduxi.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/19028734403.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b41a68c54d6---zewilowoloxenomo.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/nrcruevbgite39h8tgh3r0j594/lejironosebewenosoli.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16103f4e271248---bozenixalarelabovodetil.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/rusesamekadikikanixori.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33c958325---vafexefokixumalapil.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/mutizu.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/gapifubininovexovonorem.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/18/file/20210518_172719_159.pdfIn PDF document text
    • http://zlato-stribro-investice.com/upload/files/joboliwedafuloxuxox.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a570b490720---40640592026.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/jugurudojoxegopolixigis.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/a668ml2u9i7qrd42618clsbj4c/kebijebesul.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/99501996465.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/902ef6aa0f018d69fbe73006e806ccc0/93529679651.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/71761928198.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_off0000d0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 10132 bytes
SHA-256: 0c3d3549fab81727f99fc44d9d25138ab7ae75dc1de595e2c032209481f28e12
font_02_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 19648 bytes
SHA-256: 883fa00d09557ca080dda2ef801b9c2801d60d2a8c830a786d7da212f82927ba

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