Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3a836127e316c2…

MALICIOUS

PDF

93.5 KB Created: 2021-07-02 03:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1b2e5c66c1d77e755a7960f68d6a7770 SHA-1: d84e82e2b5a53a866de6d50672e0048938d8587c SHA-256: 8f3a836127e316c2dc53919039215dc4f39a9679f4e16d41af74aef0bc0c7f8b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains associated with compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs and link farm structure suggest the document is designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://philabc.ru/uplcv?utm_term=the+word+of+the+lord+is+like+fire+in+my+bones PDF link annotation
    • http://wecans.net/_UploadFile/Images/file/dejepivilerowafafiri.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/43616172232.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093af8e4a5f6---94960428198.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79d00f40a1---takamiwemebadapa.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/vedifadomapexor.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/98f8909f44f9dd974b4f9d06641ce469/vezedanum.pdfIn PDF document text
    • http://amdind.com/userfiles/file/vaxuxer.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/6fb54eb73f0edb20f5328dbb1d5b998c/pisosasuxexinigivi.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5201ccf316---59113066115.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/77364093880.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/31804684837.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/51617553720.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38a6aac4b4---21275801662.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/anr7of018sajqjsvobtb9r5b87/95806243753.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/422608ad4ae804f3618cfc7d9b0e7b99/bazoburizujusi.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608450cce338a---lajapifewupudukativ.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/v81jf75l4ajarjuannm5p8jvh2/todajunuxujorirosivefape.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/87805113438.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaa4931627---19255264304.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/4669835200.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ffa13f790---91477552107.pdfIn PDF document text
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/90223089388.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1850f061b---84755301466.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/89353775444.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/h2pas937opot53rboofaps5atv/49989773315.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/904e787e62b648bb3e2ee3d696fb2341/gesitafemi.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_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 10852 bytes
SHA-256: 59b7a7e79f1e208a2c56764516c868a8c5056b2260a4239eec6a66449a979c58
font_01_sfnt_off00012325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12325 17332 bytes
SHA-256: 7193202314e31f1a6880e0447130c8416786c7113841f9ff8d4c79f0c3f66190
font_02_sfnt_off0001502c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1502C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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