Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ecdd5f07931be6…

MALICIOUS

PDF

82.7 KB Created: 2021-09-02 22:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 61f7bd965fc2b5a2b61475d604299a3a SHA-1: a09b5a08dbea5a93ff1bac7b120b58670ae7fb9c SHA-256: 64ecdd5f07931be6658431b2dcba61534c0a3313ec61725915ad6fd0af19d107
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to websites hosted on potentially compromised or disposable domains, indicating a link farm designed to manipulate search engine results or lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d9660ea442bb72be3266bc8c6aaba59f/40050290653.pdf In PDF document text
    • http://shiksha24.com/userfiles/files/1062294822.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/nadevufijokikabutokep.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/bakinijevi.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/315cee5eb028d76097b529dd5718835a/77980784350.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/26388023053.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/53743122745.pdfIn PDF document text
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/lizejiruji.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/36360557704.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/21385979551.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/fokemumopikilajogudabet.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/1cba478c2ec84e2e80cae341fa35ee52/senuvewezikujopitebozes.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096687039bf6---fimobagobonokani.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/10907786749.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/11439984087.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/90005868099.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607929d62fc30---boriluvazukowejasaxodok.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/zinupumizofajotab.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210720_8C4952161AD204C7.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/47545299882.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/31129099701.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f7ed9c2d404c03abc5ca839ebe02bac6/90444047220.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/97873314531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=hornos+para+fundicion+de+metales+pdfPDF 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

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_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 19672 bytes
SHA-256: 05ae23e8e4793c3201f8dd4b275bf8ad9c350887f6761b58f3a9f33cfbc6cf29
font_01_sfnt_off00010c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 10872 bytes
SHA-256: a52e1f17ac1bcbc3b68452fdc4264a25e3ff8dafb3e08a948960ec5977dbcd24
font_02_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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