Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e27179164361226…

MALICIOUS

PDF

81.9 KB Created: 2021-09-02 22:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e7670f4741b41e5ff25f54c6ddb0ad9d SHA-1: b74205659e942fe51865dbe4e4dc4313ab4414ac SHA-256: 4e2717916436122685b21e845231c0a35b1fccce87934c0e014ddfd8f639d6e0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and a high number of links indicates a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861be89edc1---natuvav.pdf In PDF document text
    • https://yalcinplayer.com/calisma2/files/uploads/wuwifibuxuwera.pdfIn PDF document text
    • http://asvpp.fr/pdf/zumezewifolidevojevujotor.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610f06fab3ad9---wopek.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/3nqhd1hmgb56237vhtapkf2224/70008911063.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ac119c0ba1421873b121ff1502ac5fb8/latopibebaxum.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/41853056226.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607835a675bb1---5278765142.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ac55aa55a516e0618677c2131bb5d8d2/34805993476.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/3c1ad19ebff15f0dcb81330193708612/5577319076.pdfIn PDF document text
    • https://aromamarketing.md/img/files/86159651752.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2473f02a74---kisuwewuribewokawaw.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/0834ee451845b34cdda03fe5887aa221/59803135581.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/4d4cb62ab3e41e542707da92f1cbdbc1/vifivujun.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/62982c0517c9c024a538c09ef5281813/77763311535.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/dce6d2f3b29647afc4734ba4261481d4/81868783450.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/d7b9ad7f5cd1d7bdf2f5eac5ee93fe3f/xomewexozaperusivivunatoz.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/69047e3590bb71641befee140787accb/89107682812.pdfIn PDF document text
    • http://allycatering.com/userfiles/duwimerewiditi.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/40524980428.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/menigod.pdfIn PDF document text
    • http://htygroup.com/upload/files/21779576943.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/81876641888.pdfIn PDF document text
    • http://tylerdaynursery.org/clients/8/8e/8ed7c4ff1d995b028c1180c1bccb3f4a/File/ligenotiwazebitiwag.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/506015f35e9a713a5d7dbeb761c07761/92288934649.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=grade+9+math+linear+equations+worksheetsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 11144 bytes
SHA-256: 7cf440ed00ca9d519bde022d4e6556841e207d6f43a8e9b24a448284ec0c4ac8
font_01_sfnt_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 16756 bytes
SHA-256: 531d46cf319caf00f079d9ba3ddf56098c637351098132363fbceb52f06af900
font_02_sfnt_off000121a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1