Malicious PDF — malware analysis report

Static analysis result for SHA-256 248f6669399d7bbe…

MALICIOUS

PDF

70.8 KB Created: 2021-09-13 18:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6e106c83990f13ac40fcd99eaeaf0949 SHA-1: 0119d2eb1e59e0e8605c0d2e7f49bfec1298fda9 SHA-256: 248f6669399d7bbefff1d51ccac7a9d02f128184b33cc015e411ae3311298921
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple external URLs, several of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to obscure the final destination or leverage compromised infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://joeun-it.com/userData/board/file/purof.pdf In PDF document text
    • http://itemclinicchina.com/ckupload/files/99541849524.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/gusonomuvarufusabog.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/dazonipologenowep.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021090916294028.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/53984161393.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/risubasalijoxineroviliraf.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c4f3c5141---pogexoxaganiva.pdfIn PDF document text
    • http://vit-physio.de/file/90743806994.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/76040443471.pdfIn PDF document text
    • http://ymmicro.com/files/files/nopulavudixagofe.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/31593554863.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/16272939856.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cf4c6d83a---korikajuwipufijenotuga.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/jixuve.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/lewipugebewepubaf.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16134aed0700e1---sapazotituf.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/59117752437.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/28697739400.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/91602302356.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/26460663496.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/setakuzesa.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/xukumakesapijimu.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec533b7588---31651556747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=complete+combustion+of+methane+balanced+equationPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A2 15504 bytes
SHA-256: b7b70c2f27dc1d8eb95ab2eace3bfadb1119d027ade1f93a8776ddaa269af22f
font_01_sfnt_off0000dc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 11204 bytes
SHA-256: 4e4146b56d178d0c34dff0dbb7f482ad30dcd700389e3ab8ec0ccd081995fe40
font_02_sfnt_off0000f590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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