Malicious PDF — malware analysis report

Static analysis result for SHA-256 74593f9bd03b7f5d…

MALICIOUS

PDF

79.3 KB Created: 2021-09-08 02:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 17ceb5cf439023e39c5ad9af6ffaffeb SHA-1: 9ad5b34b0fa10bc3d2ec6e968722151bb778af24 SHA-256: 74593f9bd03b7f5d5643386f3ad9072db79b36077008d02e6f188c17869f1766
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5c1ed50f---713241958.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/7je62mid1lccnig1396m22menc/17517136357.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/janosux.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/pulikifuvomoxesujipiga.pdfIn PDF document text
    • http://sport-way.ru/img/file/limemumisejuvujat.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2bd7b3480---mafewegofuwunob.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607846d07f40e---zokut.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210806093555.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/29704615861.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b6313cf3f7149dbb466d4c3bc868d0d1/kazudobumivipel.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d229ffe7251---19962653263.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/tawovulese.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9784e1ea30---1248484271.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/guparezakipemewogisawi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071851e00f49---90991846235.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/72210918412.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e9e07b1524e2bad5e2a5b9a7d26c9128/77310890688.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210703_204E0A54F5A03298.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/38893798305.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/dabosopewivenamalarena.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/b77828a0313fd5335bf3ce55f08395fa/sogatofe.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/nirilexoxob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=business+model+generation+book+pdf+downloadPDF 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_off0000cf09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 17816 bytes
SHA-256: 32797fb4d946a76bfa1b577c814595ed9dcfac0096f7e9139c2eb2637b1b1c60
font_02_sfnt_off000114df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DF 11312 bytes
SHA-256: d1043737026a411d9d007fa06368ea8eba0517c2373892e8a3883ac6291fc3b9

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