Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb240535435b3b7e…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 16:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 182581a5a5e6c61a4929050c6db91eb0 SHA-1: 807315bef8dc90904e5a989d1a1e64c3fb7de678 SHA-256: cb240535435b3b7ead88a1b4173e737cbcd78355955f1272f2f10f9168118714
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://archism.ru/uplcv?utm_term=android+messenger+app+source+code PDF link annotation
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/3d68305e7bce69ca639d28b1643f8ea8/96371750429.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613800ace2e97---83538896882.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/6756141203.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/wojelezowugononeref.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee0e7932a1---fufotavokufujazexuxu.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/wifibenerakokedupa.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/roxol.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/62942775239.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/rivabapa.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/fimonufulisig.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/57307945985.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143f0b7719f7---vidofufakoja.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/84645364515.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/59460788238.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130465d3ac56---fulajefafafomarexonul.pdfIn PDF document text
    • https://finliz.lt/i/File/nakalulala.pdfIn PDF document text
    • http://glassick.com/userfiles/file/816688404.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/63265877086.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/1a64ffb9012d6b6d1e066ff259631328/11307386648.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614deefcbe1a4---75419377312.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/h11ie2u9n7kbsqh1anho0frtv3/65281104148.pdfIn PDF document text
    • http://test-immo.com/file/32231606147.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/bidovatikijofefe.pdfIn PDF document text
    • https://agregadoschucuri.sinecsas.com/ckfinder/userfiles/files/nuruwezuk.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_off0000b05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05C 10796 bytes
SHA-256: e16c011b47956a80096c9719e77021197c22ab15b4dfcc8f4d66060f228fa319
font_01_sfnt_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 14728 bytes
SHA-256: 37accbd950d95b62bf0e2353b47e8c438e518ba9ca2f4f396771d05a1e6d83e4
font_02_sfnt_off0000edb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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