Malicious PDF — malware analysis report

Static analysis result for SHA-256 2129f87111011544…

MALICIOUS

PDF

82.0 KB Created: 2021-08-17 11:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1ea8a0913f15c0a66b9aa6f469eecb91 SHA-1: 6b62b92bae35a6fb76bab8a2d25b2dd046111d95 SHA-256: 2129f87111011544533b99d92bfd56945893eb7f78640ad92dc188825deaf890
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely serve as a distribution mechanism for further malicious content, potentially exploiting embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://monroehighwildcats.com/clients/40160/File/89366974811.pdf In PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/7jjsvaha16um0tpcthqf24o7d7/monuwedekigofewa.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210622185657.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704192e4370---52200809613.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073140da5ac9---58586570329.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f0ba21e9d24---xiretibavamenigitutojujas.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/649ba019979629a9871e1560a0bee252/pinutixagitavewutusojeb.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/71298096999.pdfIn PDF document text
    • http://uchid.com/uploads/file/wawipul.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/poxoxegiratipufipezubemik.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/woxefinob.pdfIn PDF document text
    • https://ysh.my/userfiles/file/sejitap.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/4544557892.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ffaa27d1dc91f826af449a6c4a3b49b8/28706800111.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a4714c753b7ec92932da2c93cafe39f8/26733036518.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/52203053069.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/dijoforuwonupadew.pdfIn PDF document text
    • https://apizf.org/public/file/8032078754.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f0f995f75---37443366035.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/336198d5df056f588af0303a14612400/66018223111.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/8108001678.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/8985ca48f48ef5b6205f0ed43241dbc9/34178647135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=judith+orloff%27s+guide+to+intuitive+healingPDF 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_off0000dc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 16900 bytes
SHA-256: 4a3a935d250d3fbc4de61b86a8fb4e4fa56e71714c91c175a6e0540594ac66af
font_02_sfnt_off00012071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12071 10824 bytes
SHA-256: b1170e2b3d70551b3f3f086a567abbedbcd4ba794c6b59e057d5fb613850cda7

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