Malicious PDF — malware analysis report

Static analysis result for SHA-256 89294a70d7e029db…

MALICIOUS

PDF

81.7 KB Created: 2021-09-12 20:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0869c09b135d636eba5af4162eb943a5 SHA-1: d1363419d55f71b469d3de681a4dba0a575bdf69 SHA-256: 89294a70d7e029dbb9c211156b3fed2857ac33b147f757e0d2d6739a1e28392f
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting it functions as a link farm to distribute further malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer, likely to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=seven+habits+of+highly+effective+people+free+pdf PDF link annotation
    • http://airelimpio.mx/img/editor/file/muzipuxapujixop.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/78811822085.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/72783904730.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/povemopanukatenapexaximar.pdfIn PDF document text
    • https://loctra.net/userfiles/file/ranenedipupupe.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/liwan.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/74117548598.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/powapigogafutarukawedibaz.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/0290nqn3p9apou4e2cra0ra931/91787439888.pdfIn PDF document text
    • https://empresa-venta.hr/files/12592189678.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/53972386020.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139f0a05b618---63001148735.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/vufifopafobiraxomefagez.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/gipilebuxarovimixi.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/b112ec48776e08098f5a7c8532cec544.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/dafijawekaralodi.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/vijavidazenu.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/27654374688.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/31475599685.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/sitirax.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/20069300279.pdfIn PDF document text
    • http://csigikes.hu/admin/fck_upload/file/xizewobokasuvemiwujuxe.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f4e3261bc8954e83fda29d1ffd713bba/49137578963.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_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 18392 bytes
SHA-256: 3ffc60521e9991f0a8be18f4f2df4d47f9a730cd0ba036d96b7f577e25f737d9
font_02_sfnt_off00011e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9B 11292 bytes
SHA-256: 3cc7988707cdfd614404375257f1e343bec1f2384e64fc1c316ac569e9757819

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