Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8d1a115462a2a2…

MALICIOUS

PDF

123.0 KB Created: 2021-07-14 01:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9fc59c2c44657e2e3583d5772ee56d3c SHA-1: cfbf653207d4aaab1540be53dc48e06466097394 SHA-256: 9e8d1a115462a2a260a83c5c1c6e71d9da36b629132e7dace76b7f380c8101e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a link farm pointing to numerous compromised websites, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://crewmak.ru/uplcv?utm_term=orthographic+drawing+projection PDF link annotation
    • http://studiorinaldibedin.eu/userfiles/files/gukuwexavonojadiwenubes.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/i1j9ub8a9r7d6kpd674vn9i5jh/77935716659.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/48201018202.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/rikukegufukuxabudanu.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/62126081423.pdfIn PDF document text
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/sitetasanegogatuwuruj.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ahtskvjgb2i1mvnu3jum9tjk90/20703198425.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821badf11b1---jagonujatulir.pdfIn PDF document text
    • http://mextro.de/upload/files/63077795013.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/xuvedege.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160727d0683a20---7400502531.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2b781b091---50678425839.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ee607c227d7c19aef11e6d3c867ffe2d/gajigagokumasa.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106130054496307.pdfIn PDF document text
    • http://ridendo.cz/files/file/87939714395.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac697829fe7---36861218765.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/74097147641.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/zedokiw.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/34515445767.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/lj7rtmh0pcl2f7a2rtti7cv8d2/pidek.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609f450f286f7---76851460959.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5947522c7---37477622761.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/53887438014.pdfIn PDF document text
    • 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_off00017b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B66 19220 bytes
SHA-256: e1a4844d2999dd8a5a236a8feae23f507d468a02cfa18497c98e0e2f3441fdc0
font_01_sfnt_off0001ae1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C632 10820 bytes
SHA-256: 30e19d8a6ecf7707b73660018dc986a90d8bcc3b7abdeb3092e1635a6a4cdc1b

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