Malicious PDF — malware analysis report

Static analysis result for SHA-256 907278acd13013a8…

MALICIOUS

PDF

92.2 KB Created: 2021-06-29 01:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d443c58d0095e064f89f1b3ea46ba82d SHA-1: 2d2cbe02e2c71f7d4d28083d6fc3f0b9b10b3e7a SHA-256: 907278acd13013a8815bd0a2e4fb2d11441563a52d5d3cc318ef0330f0825c4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://studiospazioambiente.it/userfiles/files/38745761224.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/ad2ce2ed5dc9d1505e1437c38f007c91/vusujetonijopikete.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c57d166c---tenikapifonetixusates.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/8f0851fa6e2cc9726af035ba097932b4/33251586900.pdf
    • http://ridendo.cz/files/file/72670874065.pdf
    • https://heks-tech.com/app/webroot/userfiles/files/2634529909.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/19a64ebd7f9dc0688e49bb842b054cba/77419773883.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2oa0mmh52thk975g9ujs8r6bj3/zoxes.pdf
    • https://adian.eus/files/galeria/files/sufexoketemisipoxuleb.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/f00cb493304cd9946c97e440fa6bec8f/fuvilebawiwomirilisezev.pdf
    • https://autosaloncenter.com/uploads/file/foxalegaxenisowef.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/aecaf62d2a399c0aed9ce9e95f6f2273/43111403164.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/0a4c1795e80974460902c788430b8858/17795504171.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160d2065294786---zudolukotulufulajawen.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5f7a792c2---zedulurapup.pdf
    • http://russkiivopros.com/images/FCKeditor/file/kovanerobeluwosara.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607894caa274f---85071694920.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/583e397097621ca61d8127983bbb2967/23321861093.pdf
    • http://outspokenholland.com/userfiles/fckFile/20210514210153.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/539c3d1e8e42f6ebf34e2af180614cb7/99313711130.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089bd717b21a---vufuxaf.pdf
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/74519627643.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fb009f958---95504157593.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ufari2vq0gibbsc6nvolocji7o/dojasafukivuditowarejevo.pdf
    • http://soflocops.org/clients/83264/File/ziluxidiwalupavodu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=maths+lines+and+angles+class+7+worksheet+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 16792 bytes
font_01_sfnt_off00010427.bin
d06246de5fbca08a8e71b3266423534d5cc020e17a1f81eafc946de7058d617f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10427 16088 bytes
font_02_sfnt_off00011959.bin
1a350c3dae5dd63a07a29f3e1fe3d4339400dc2be3a4c3ba135827745fcb4c69
pdf-font-stream PDF embedded font (sfnt) at offset 0x11959 18100 bytes
font_03_sfnt_off00014961.bin
737f5845096fd3317cd1839de5ed7356c18a5a59df74ff6a4a18f0b7b49b4121
pdf-font-stream PDF embedded font (sfnt) at offset 0x14961 10868 bytes