Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd39437bbe0b2e1…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 22:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2f41036fc58abdcaad501ad3797170a1 SHA-1: 64fccf6f9746d4bc40108d642db7b361149fd1d1 SHA-256: bcd39437bbe0b2e13db841b68160bb0019e16005af5615d39ebc05f6d0eb79ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=dysfunction+of+sacroiliac+joints PDF link annotation
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a232fabf041---fegowo.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/vmndj1dnnhvmnod73vkscfukja/xoneriperelovid.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16078816d11137---40262702285.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/goref.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/1ogrgh2mtk61lg923dckbnd4e2/mebobuvowamakegid.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccce06377ad---vefebofiviwusiraxulev.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24a73e0b80---92190318066.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/juzalanepufaxafizap.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/p4ckt1dllf43ok62qcg9mu8cn3/losir.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/83880287182.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a951810a5c9---bunalogidajojoge.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaa74ef262---24933562741.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/fifivatekob.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7a8e0493d---nosuto.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/9f4a2b36a291c220c16651b569a12f75/41375597344.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/ad486c6298cf766cea893e369f4eb2d9/bejofomu.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/33938008403.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/1019550125.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105280313476544.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5c4619bb9---20965270949.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160866cbc22bcc---ziviwewetisozemefij.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f534faa786---52319707612.pdfIn PDF document text
    • http://iwishop.hu/file/leregasadadokomi.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_off0000ea88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA88 10544 bytes
SHA-256: 6ffa310e6d8e06e8d0600d62922319a8d332638b0c5ff6cbda50fef15a277f7d
font_01_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC3 17120 bytes
SHA-256: 2a9be0d6af8f0c813e44925405866855b18b5ff30ce1fa43d3c4591c2b59c804

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