Malicious PDF — malware analysis report

Static analysis result for SHA-256 754523149cdbeb71…

MALICIOUS

PDF

72.6 KB Created: 2021-08-26 05:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a6e5b3ed4d93775db7bf13bdecd33726 SHA-1: ac5545d74870f06c8058b12621e30eeb13a1c784 SHA-256: 754523149cdbeb719f444174b8f81699e5ddd5515b1e70565890d9abac6df710
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

Heuristics 5

  • 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
  • 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://garglob.ru/uplcv?utm_term=document+scanner+pro+apk+cracked PDF link annotation
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f022920b1e---79315207962.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/73641167384.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/paritetejomokavamuliveda.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021060123050873499.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/gosinug.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084226058953---48216903574.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/litakararurobilawituto.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210817102641770.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/42591990539.pdfIn PDF document text
    • http://bwc.lt/i/5080363188.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/kimikigogadolun.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210807034911.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/vinag.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/64223057179.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd7f80658---dikimerezavomuzumifixenix.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ea28de97e56acf078d563a86c26b31a0/jutebip.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708e3b2392d---69762310296.pdfIn PDF document text
    • https://slide-bearing.com/d/files/78260288599.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/6ea19fd80bd1aa1224e2c77731655cea/89921220948.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16073046364c5a---rowaki.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021061802444173499.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202166659329149.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/536b169926869cd42ad93e581ba1c846/lixirulo.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/73349696591.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001033a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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