Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fcfa30c181bec0…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 08:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 104856630299a8b7ae321e2f2b4e5c31 SHA-1: 7c27977ae39e77bed73db0d67c9c9412ae7008c8 SHA-256: 76fcfa30c181bec06344f4087ae897d96940f742e015f02fe8810a1a002f7209
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 embedded URLs that likely lead to phishing sites or further malware downloads. The presence of multiple links on potentially compromised WordPress sites suggests an attempt to distribute malicious content through various deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=dragon+ball+strongest+warriors+apk PDF link annotation
    • http://bluestandard.pl/ckfinder/userfiles/files/97194038451.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/zefofobovirigetiwewizigat.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/9a6773583a3b6c17c8e4929cee68db46/70409829416.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cfee2c5a7---17554335482.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/41004764578.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/21389184115.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/18237245198.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140933cc4c74---30582148131.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613011deedc37---luruserenukipexureko.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/69421125805.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210917005234_yxf56l.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/32041855990.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/57b941762149ea389c792a6ed45476b0/96479609036.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210903_6D71294A7B5457A7.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcce99b84b---nakewurisuzanulej.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_off0000d5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DD 10744 bytes
SHA-256: adb297bf9c3961ad2de951c55aeac6d197ad9b812bd7d76e1e1436a0f5877619
font_01_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 17192 bytes
SHA-256: 80e6740e93f5baee22c9b3028347d3befd169280a90cd55054feae71ae3cfd6b

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