Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e75b5ea088ee11b…

MALICIOUS

PDF

93.4 KB Created: 2021-07-17 12:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b5b28ad931832f6db84e75c2b162e284 SHA-1: 7ef38d59edd9cd31de0468e419fe5344bdb3cac9 SHA-256: 1e75b5ea088ee11b857ab01b3730c4ef3b74e1295f55008ee030fd9317775fde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a lure to redirect users to malicious content or phishing sites, aligning with the characteristics of a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/9737ab73c0e4dd46c52f0e6dc3892b6a/xususefavirizalagudag.pdf In PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/87075224269.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608427f23e601---64806342781.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/97993534183.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/db8c2331c54d14463135e5ad2896f6ad/83265076724.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942b9262a34---62879918881.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef1d42b40e---94358657107.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1ee068083---funifowive.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/68499254878.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/regufetulonagap.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/9186056085.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/busivulevulajuvijuxoz.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d48dcce3228---22456942238.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/d9aaf7eaa3806bb7c0f6136f1ab714e6/22587028084.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/abg3g9bnc1d4g9l2em500d6251/ruzemud.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d86adedad26---32198583296.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/vekafano.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1c6bbdb3ee5ff0f0961ed63ecd410b25/89208528101.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/26366876325.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/63541836657.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/231915029212.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/gizitasutizoz.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28fe4e5f0---pinininizegafezexik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=bayesian+inference+in+statistical+analysis+box+tiao+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_off00010653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10653 11020 bytes
SHA-256: 69f1cb7faafa3594f87c7a5513878c97cd81f00ddf759c19ecc121e737138590
font_01_sfnt_off00011ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13803 18208 bytes
SHA-256: 8b3dff238ab0ff26838e385e806c4622ae41262bca6858018903835aa418c9e6

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