Malicious PDF — malware analysis report

Static analysis result for SHA-256 406779074207dbd0…

MALICIOUS

PDF

81.1 KB Created: 2021-09-21 04:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 210858f80333e9a383397b43969f3498 SHA-1: aca4284a3f5df184af93b7b7654277b00533b6af SHA-256: 406779074207dbd0b77cddeb8424ef5a680bcf6eb4c02e9f869a58bcc9b3f39e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://huntic.ru/uplcv?utm_term=how+to+install+amazon+fire+stick+lite PDF link annotation
    • http://kbidc.kr/upload/editor/file/1631163835.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/68544985159.pdfIn PDF document text
    • http://popmetre.com/news/files/sunoxapagudepazef.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210908090312.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210917014940.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/19731923305.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/27377905870.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/62257253024.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210906_190547B0BC201583.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16148f3c00f94a---27520102979.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/kariwobebi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613b54ae67256---18733688099.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/koxulegorovifewedizemi.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/ninogejexerazux.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/wujudogero.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/aa38386beb33a4e80377a68f615872d9/sugajani.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/kidamugazonevolibimer.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/38787329680.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/lumamapenavezebewuta.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/5600925760.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/66512205648.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/46471355702.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/tuzope.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/62319796654.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/72765343751.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_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 10728 bytes
SHA-256: 6ade57810f4104b07cf78df8556ae384e2acee0f4b1efcd07b212ef333e96c2f
font_01_sfnt_off0000ef94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 18052 bytes
SHA-256: f6994d7539170e1b238470902e67810ae6215293136474a55fee39a9ca6b0ee9
font_02_sfnt_off00011e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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