Malicious PDF — malware analysis report

Static analysis result for SHA-256 0608d323f25b89c8…

MALICIOUS

PDF

86.8 KB Created: 2021-07-31 03:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eb2ceb365b47143d775f8016645dd8da SHA-1: 8336de228d24475d872b39e76f2fd4c945b39835 SHA-256: 0608d323f25b89c83415f00bfc3ed3360cbcc8c52ac49026ed66dd22fc515528
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The presence of multiple distinct hosts and UTM parameters suggests a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://allycatering.com/userfiles/resuxibefewezefid.pdf In PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/ri5544kmg7fs95af5c2tki23sa/kewiv.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/76366326264.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/50824907482.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nowog.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bc59bfb9b---litexebawefugedegirefa.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853a55597c7---zewavabosipemewimezo.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8406c906520040eb5dfe9490c564b2c9/rawuwumugalaxaletusubunu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bc536ec83---64306228321.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/327c5fa1292b5ff8f1808a7f90337850/vodoxej.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sututedosijebokomowutara.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/10745590865.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bcac5c594e2---86865727675.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/r8f8krbgui742276hue6tdpeq6/kogotodow.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/ratigibavitazakajaji.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/kadonadem.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/9109e7ed9b4b660d442ee5151ddfebdf/pagawimesajomiriwazanilel.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/55a233d509c7344083f3eaedd2bac339/2647371580.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f9687895c7586ba70a82d0c032b81b93/46313583726.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/14192523166.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/jadagovorafowulavamow.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/05f2870d759000d43f1272690ffe8ebd/nazadovuvom.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/78027667444.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/26268808685.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad854c3df35---87582862375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+use+behringer+u-phoria+um2PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 18404 bytes
SHA-256: e9fc0379c1a9519b22cb2d692d4e6a893af8aa7c50711b1f049177aae2b024cd
font_01_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 11124 bytes
SHA-256: 7d4902a9614e46a01631581b95f39920187a3a1b178d8f548af661587c215d92
font_02_sfnt_off000135a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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