Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f00ed969209d51c…

MALICIOUS

PDF

84.3 KB Created: 2021-08-08 12:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0e1d5b88f20e91c30e1dd469b1d617c7 SHA-1: 90c14bc794d70593a5c59eaf8e68da87ac3f08ef SHA-256: 8f00ed969209d51c92e5f37f55055e1051ab5f47489c8259b16eaadf19ffca2b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, likely intended to host and distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, and the heuristic firings confirm the use of compromised CMS uploads and link farms for distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3f62a5eb---84104617099.pdf In PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc159bca36---15827159177.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/to7djpgoiuieiffo1mudhuj3t0/lelejenimiwagi.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/gupobif.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/vizuwewa.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a065c61f8---24091994488.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/86f22d762c35319b83013a239f44d5bf/45128370513.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162521560164.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/solenukodurofudugaf.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/jumezidonojebomukunibe.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/dgsbqv3feq2st5qfvd0gl2bb82/keripimelutirumigenop.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/8350318662.pdfIn PDF document text
    • http://statenbracy.com/clients/d/d3/d362857cea7b6c304c7898dd6c6993b3/File/kakikezosomufej.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/dijira.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/bixakozutolumuvufilepuxor.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/7de15cf531bcc131b6d43c3dc94cfa60/zomapesunuxaropuda.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7f2d86e724d11a52fc6204a99a1c2f32/84374295544.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/d5fu835gicav42bqc7sida4cn0/rozuwevumewenami.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/ad6cb91ca1f0bdc91e89b19323a5c964/53145808218.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/gasafanonem.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608930a926b4c---56287795263.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/zituguxilijom.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/43401772561.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b1200a20aa2---71807932079.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db395279bd---39122739556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=mois%C3%A9s+y+los+diez+mandamientos+capitulo+10+facebookPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C9 11508 bytes
SHA-256: 0d7589ceeda3a5885b4730382ad09466b47c95206e023d8bcfdcf9ec5f2dcfbd
font_01_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 17640 bytes
SHA-256: 99f552471d97b58bcb66d66790ea36b51909f3eb9a0ebcd8975032cc1396b127
font_02_sfnt_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 16384 bytes
SHA-256: 6bc4420bbfa61156f096b6f0725168f8601d7500e332933a6f3144c23c09a2fe
font_03_sfnt_off000126d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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