Malicious PDF — malware analysis report

Static analysis result for SHA-256 6098f384a7630145…

MALICIOUS

PDF

88.2 KB Created: 2021-09-03 06:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 91bd06fe3d8c89fae03e8b103ca9c0a4 SHA-1: 3b62cd7b4655639d1463012e7aebca4474c51228 SHA-256: 6098f384a7630145e0a70ec8665f3793aceae25ae4e040f3509f1eba95fa0eb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous external URIs pointing to various websites, some of which are hosted on compromised WordPress sites or disposable domains. This pattern suggests the PDF is used to redirect users to phishing pages or sites hosting malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=lg+microwave+model+lmv2031st+manual PDF link annotation
    • http://cafemsoffice.com/userfiles/files/23647039471.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wepitejexosuzabofikusoji.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/47914162432.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/tal7gc32b4dpttrji37ckfd0ul/xijefinemi.pdfIn PDF document text
    • http://recrute.fr/files/files/26696022982.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/61bb625dba295c64299791e9ae0a6884/79398059198.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/f3d2dd3263b94a500afd85dab489b418/vofitafewe.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/h9otlpvs121lcfpt93hqqaesf7/42403505399.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/14886146002.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/87588688093.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0cd71577d---72148517287.pdfIn PDF document text
    • https://kede.org/userfiles/file/22975961863.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/93bf44b785171c0adbab50be706bed43/baluridinadalilesetatid.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/0dcr39udm3rr6r0d14j6rf5bqo/50799961788.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714dfe7b364---76003514389.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/1d1pc0eo2o7jrleili669h3s81/25697666301.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1624847896.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a391af5cb14---sutemonevitepot.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/xuvufumetizuvigobobugek.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/81867cffcf8e73880b135f3cfa07169b/mumawolujegobikikede.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93bd3b7f3---53450590988.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/a7f5e36d415488075313a2571b955ec2/batewobediborafibosirorun.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a863e9805f8---81349641549.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac405aef4aa---makupelurof.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_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 17604 bytes
SHA-256: 73ceebc8073569ad69d323b664138a431a5dd6a4e9b013c322d5d96a5bb06fbe
font_01_sfnt_off00011e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AD 11388 bytes
SHA-256: 5feebd965418a90c69814e1b2b921020063035e7de1446433e6d37de385a8848

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