Malicious PDF — malware analysis report

Static analysis result for SHA-256 c076bee73b55e622…

MALICIOUS

PDF

85.8 KB Created: 2021-09-05 22:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: feb7ea26b51e036032c9d3a4e5debfb8 SHA-1: 8d13073d9187a1fa8b3c3f4ba9eb050a2488f26f SHA-256: c076bee73b55e6223c775c61557df8f0dfd4fc23599aa0c8112b01d9f6418a63
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a technique common in spearphishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://allytemp.ru/uplcv?utm_term=cateye+strada+wireless+cc-rd300w+manual PDF link annotation
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/d4bc385ebb466f0fa8c97a6d2a1bcbd5/66269105625.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/38511642355.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/41989354061.pdfIn PDF document text
    • http://ahchala.com/img/file/29433392489.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/80614485282.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/tojeremumirodatobos.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/236971d4f72057020c48b030579a1754/46144893165.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8457b20d---besunuganaki.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6ab306fa299bb3ef09a4ec35e06eb4e1/lupagimizisikel.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/nilazuxudewek.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/figuxolufokus.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4ea8c937eefaf8326b7801d2b1a932f/16567878053.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608b650b35c52---38382857161.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc04889dad---54567876462.pdfIn PDF document text
    • https://aksusu.com/upload/files/5781606583.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16110bbe020633---2215761750.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/52267666483.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2265dc98f7---mivekifexilewav.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/wilakukik.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38465121228.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/palegatodono.pdfIn PDF document text
    • https://tangentemag.com/img/file/jitaluloduvukape.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/3e00f69ad65203fc4834c06abe8898e2/rejugudurokesoledox.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC964 11072 bytes
SHA-256: c6836756391695b2525ef8fcfc5fd61b9f4cb2a42e90319342ae0aff6dfedfe9
font_01_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 22252 bytes
SHA-256: aa387ac694ef8654267b2ca0a55ff99e70be126f5040b2302139c941d054ee5f
font_02_sfnt_off00011bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBF 16104 bytes
SHA-256: 4204f4a647e3e8488fc3125e36d68471fcc515b787f7ef36a685bb1e406e82a7
font_03_sfnt_off0001310a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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