Malicious PDF — malware analysis report

Static analysis result for SHA-256 447d7ea2f908100f…

MALICIOUS

PDF

90.5 KB Created: 2021-07-08 12:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7747e70f79c9cc8a0fd0e80628c380a9 SHA-1: c5f591efdefe5558905c21e7826e1ba94d06f41b SHA-256: 447d7ea2f908100f9913203ca0c70308cd3fa36157a186eb376dc4a256f4023c
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute phishing content or malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to leverage search engine optimization for malicious links.

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 http://yournamebadges.com/withyourdog/cms_uploads/file/46091476181.pdf In PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b158688169c---46650077375.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/2a858085a0b41ba4c1e8b60c8882106e/39529255837.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/16944069936.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7f098296afc061bcc6f45d5ef172ad4a/dakosate.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/si5hnruudsabqm50e18qdor3cr/redelutalebuduwok.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/88384027961.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdba0d7a13---95837675974.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9f92c1b5c---94366547731.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/mulubosodibapadinobaxebat.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdde68ee304---tudobi.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6ac9c203d969b7177a65358b04fc44d5/88360948972.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/teniwuregufakapujejurot.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/lodotirufuxur.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/271583293.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/c52a149b977ad9f8802f17073701a5a8/92310466279.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bd30f6333f5---zidesewevokeso.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf25569998b---63201720124.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/nuluzijejowemefesaxi.pdfIn PDF document text
    • http://fitviewer.biz/files/file/19775570099.pdfIn PDF document text
    • http://vejwun.cz/images/waxuletibijut.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/2ad65be9bc4deb4483b2a75d24b7de45/65727850183.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee5593bf5---96957699568.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/balemugipiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=class+12+political+science+question+answerPDF 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_off0000fe7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 17100 bytes
SHA-256: 0279b283501275f0b7bdd7bbf67e731538514d0e0876648ca8e3d05260e97637
font_01_sfnt_off00012ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD4 10900 bytes
SHA-256: 893148a1c7fe4c2549cdfd9a36c5cc689372d945072665731f1586144ed8bcd9
font_02_sfnt_off00014462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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