Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b2786a4e0c1015…

MALICIOUS

PDF

185.0 KB Created: 2021-06-29 03:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8c7a452bd5e2bb82fb5ee6eef4893c58 SHA-1: a960fd4224e8845aa57e7d0f0c8fd295ca339f05 SHA-256: 49b2786a4e0c10159234ec0b47c25b5f72f94896423227ace50719492e9b65d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to obscure the final destination of malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

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://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9108243b1---rebulavoredotaverasokovus.pdf In PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/zokenidira.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5fc58d09f---66024943454.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/tuwomedaxobowafizalapex.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ec76880f5---42807344427.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/bevufetamaxu.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/ragiwimuf.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a801b8234e---78743693646.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/jiganezijuwovemer.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df6607d4e3---kuzupijowenixoxuxajadepi.pdfIn PDF document text
    • https://beaszemin.com/files/lexakasape.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/78082826453.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2d5f3d52e0394578ad434e62f3a1a1a5/bomene.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/lamibamoxi.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c098e822d3---zovagemorububunezunilosob.pdfIn PDF document text
    • http://ahchala.com/img/file/39045533365.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/da228e7fb61212c9ad9c912d80c26c77/lavetikujuku.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/fe50c2740a5876209420c7344e7f9634/2806238744.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/6ufemd2dtbonbbun37l6tcoif7/gozeseduvuramipesifagunod.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/350e820d3b576a778b1cc457bbd9ee50/dopazofolatelujot.pdfIn PDF document text
    • http://sushi-belovo.ru/files/bekugiwejijo.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/velazomabuduxokawenizizi.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6ccf43e63---mivakofezopevugorib.pdfIn PDF document text
    • http://3will.org/soubory/files/71523529608.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210624123756515.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/vusiwinimelitefibiwelibut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=rick+ross+work+mp3+downloadPDF link annotation
    • 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_off000272dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x272DD 19084 bytes
SHA-256: 8d2192d6654c5e9e361f0f83dddf1b9f8f8c3416e135ec33e8fa113b20c03b93
font_01_sfnt_off0002a52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A52D 10840 bytes
SHA-256: 351170bda61c0e20f9c052c4b4456efd5422fff36468a6e26bc236176753ec5a
font_02_sfnt_off0002be46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1