Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cdedfd4a11e9ef…

MALICIOUS

PDF

72.3 KB Created: 2021-09-07 04:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7320db2128383004957c681a8ac5234c SHA-1: fb14c424a4fbf0ec653f193ee10a6128755f87d6 SHA-256: 01cdedfd4a11e9efbb008597631431b66d340f62db6d4cdcaf1a16e935f08d5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=excellent+customer+service+delivery+pdf PDF link annotation
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094132952aa9---dujegali.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160966279039b4---40454900097.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba98ec3cfc9---59420683518.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/7271315077.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fafc2e7a77---raxevovetezipasusix.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/lipaxanodeg.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/govasokazodavadu.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609db12d62253---pafowekokibujodovozeve.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161045cf354818---91052564709.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/lopusivogudis.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607fcb5520876---24044321072.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087bf246ce1c---leporala.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/0ae520da5a906ef0a863e67e1e6f0e1c/61882863540.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/28095736261.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/demavusu.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf9e0c0562---61593685719.pdfIn PDF document text
    • http://aplus.to/userfiles/file/gipiw.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/sowawojuweberil.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/mekowevebini.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/46583296666.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/tosativewosuwuzokafururu.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/82740803377.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6777dad2d8364af1e761fed4919e2bf1/2228579823.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_off0000b72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB72E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 10984 bytes
SHA-256: f8de67ee1918dd8cf9cc9f04678f2e070cd31438f36fac3a089920b5b2023d10
font_02_sfnt_off0000e8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 16736 bytes
SHA-256: 713998e247e2b05615cf06a328e281545c2d339183036ea525e76c7ee0d80e98

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