Malicious PDF — malware analysis report

Static analysis result for SHA-256 9102ba6f05b75436…

MALICIOUS

PDF

86.8 KB Created: 2021-09-01 21:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3ff4d60c90d98a70d73ed3b4dd1676f5 SHA-1: ac8ec7a86ad75aa068e9a32243e729ba533502fc SHA-256: 9102ba6f05b75436fa2d67f8db291dc6aca956f482c618ba2e4854fee28862d0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external URIs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://crysiq.ru/uplcv?utm_term=western+classical+art+traditions PDF link annotation
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853689bbb4a---52797264342.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/jazikes.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/oon287c1m2ub6ndkehrqg24nbe/vapufobon.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/b7956298a7b134c773867e08bc61b7a9/robiraga.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/7296677961.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/51c9674a2e3ec05cf2f8338f136f6ee4/jowituzurufusewiloleso.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f3765dfbff3d70a3ac4b91522472bbdb/tiruzevofo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5b193d39ad521d67ff4d509818dbeefd/segurogarojurepewolom.pdfIn PDF document text
    • http://anpo.vn/upload/files/piwekorutekuzur.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210607080602_odgl9y.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/mumumawaxim.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8a29a487c01c077566bb22d2b217c95c/74956366510.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/44082944725.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/97396250389.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/64493723630.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8601df255d---dimegopokejepikojowivegi.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/geputetezusukofogufa.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/3891457063.pdfIn PDF document text
    • http://mckeoughfamilyreunion2021.com/clients/b/ba/baf9e6b347377fae0abe5a87436fc4cf/File/dotanum.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9f569286de6f0ad9ac60d3211d59a024/xivod.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/gopibezemuxigudalagawuw.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/81526618385.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_off0000e975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE975 10356 bytes
SHA-256: 862b203a610f33fa7fb26f3ec1b6f9b4911ad9e6f78f0145bdffa20391eeec21
font_01_sfnt_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 19988 bytes
SHA-256: b421f95de5252a2bc126db7b1151a7d84f0f42d8ec99b10e44881ed0ba598982
font_02_sfnt_off00013382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13382 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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