Malicious PDF — malware analysis report

Static analysis result for SHA-256 d972381f715448a6…

MALICIOUS

PDF

94.9 KB Created: 2021-09-07 19:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b72c53a5eca37c32becaf7d891b88e42 SHA-1: eddff5ab485d3a314296470ac0ee0c6aaac29dd4 SHA-256: d972381f715448a62e4838dbea7b5def8889ca16f0609250da5ac5cd83c195a0
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to lure users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=schedule+iii+format+of+companies+act+2013+pdf PDF link annotation
    • https://argentinaproduct.com/ckfinder/userfiles/files/tisamofinoni.pdfIn PDF document text
    • http://khocabien.com/uploads/files/59321647078.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f132cc37d5---3495241766.pdfIn PDF document text
    • http://accronline.com/userfiles/file/figijonezezagugonozekeruw.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/fufiwobomomotedabipunaj.pdfIn PDF document text
    • http://dakmet.pl/upload/jojivigunozamirofet.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/xejimexenofibozavofed.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/wasedoviwesitibifegivovib.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/11b212ec31b142e3d6b2bfd53d7f23a1/47394239891.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/c66257295ab729ca569963454c50ffac/tatuboso.pdfIn PDF document text
    • http://novichiha.ru/pic/file/dufukilarokavixuxesizep.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071bd599c13b---84711224490.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021060722230016.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/gopefomozebo.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/kiguraziboka.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/sakebevexole.pdfIn PDF document text
    • http://whatdwellswithin.com/file/59885628274.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/judelumajafimekuku.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/35246344621.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43101b5bc5---71752522256.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16094f22fd7e76---fasifuza.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/juvepuludebexulab.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/gozimososubigamam.pdfIn PDF document text
    • http://saptpadi.com/files/file/fugetor.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/90baabccc918004cc197c2b3e3fe3836/polagow.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 20832 bytes
SHA-256: 736ee1b91ed1749589e0c66fe8d4730416b543418c62e50666ad3bd8069299ef
font_01_sfnt_off000139f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15207 11524 bytes
SHA-256: 42b80d663fa350dd08682acc1d57cc6059e1420b904a267a354a69667799760f

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