Malicious PDF — malware analysis report

Static analysis result for SHA-256 11601d18e676f830…

MALICIOUS

PDF

74.8 KB Created: 2021-09-09 19:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b4ed814a7e9c51e774f069fb5e97f24b SHA-1: cfcb7077e9c37a326bad5f6c0afbc10ecabf9e3f SHA-256: 11601d18e676f8303332f06d0addd798384a9223840a57935f30673e41b8b418
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=edgar+allan+poe+pdf PDF link annotation
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3f4199daa7e46933774946674711ec00/20451503793.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/buvuwo.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/40782792873.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/rimajepise.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/tukujajetivowejopew.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344ef0c7d55---94257143114.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbdaa4e94d---nalobovaxakup.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/mukudaromorose.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/reseregupoposupibig.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/2349627336.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/40864410658.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161378ac9d39a6---8350920535.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/vilafaxisaxodiwolexesadet.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/bifatalivurofelidutinirot.pdfIn PDF document text
    • https://brukspec.pl/upload/file/zuwemijiritupubafuso.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1a44b0cc5f9d04b630ae32fb933f6dff/23133169490.pdfIn PDF document text
    • https://alpinashop.bg/files/gomizefafo.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301072dcccb---88079060170.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361986dc2dc---11277046141.pdfIn PDF document text
    • http://health-bridge.in/upload/file/97622175913.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/wanuli.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/buxuxanixugomarivixoxol.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/91120542437.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134219445479---24128346518.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC266 17172 bytes
SHA-256: 5186ed37c89094c48d3b282e4f01e4834fa794f0101266978b92a264ab675c3e
font_01_sfnt_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 10296 bytes
SHA-256: 004e9ade28a82272f0f16a4d538e6702cbea42fe5e8ada52d7e0077f98372095
font_02_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.