Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec88547e301e0c1…

MALICIOUS

PDF

69.0 KB Created: 2021-09-27 16:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a8d7a68a09409a989dad0e810a2ba13d SHA-1: 6439a45402b91002406b58e833c78947585165f3 SHA-256: bec88547e301e0c1fc4f8a8174a3fb25171dcb9e769a99726486701aaf0d762f
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://huntic.ru/uplcv?utm_term=monster+and+puzzle+mod+apk PDF link annotation
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351fa1188e4---84087686595.pdfIn PDF document text
    • https://chungangroup.com/uploads/files/202109050123098780.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/wopof.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/bikezatopiwezogozejeg.pdfIn PDF document text
    • https://davnosti.ru/upload/bonamonerivix.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/12544426086.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/79527675373.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143847c278bd---86178242753.pdfIn PDF document text
    • https://unaizahic.com/Files/files/90322553309.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/99023289818.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b7363cf53f43bd16e0d815096c8286fa/xujekodudupefaxumojebira.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140dcdee54fe---3119113974.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/94893629803.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/4469650028.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614099cbe3f15---zubilowozovufis.pdfIn PDF document text
    • http://519pf.com/userfiles/files/93905225781.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/2109022244432066562uz0b.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/28659994070.pdfIn PDF document text
    • http://nineslash.com/user_file/file/tobewanazemepopu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae54b0744a---jiwikufibopobowupi.pdfIn PDF document text
    • https://ycb.one/pro_pic/files/12954113820.pdfIn PDF document text
    • https://datawire.gr/files/files/66301432523.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/mazigexulunamozajolipuj.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/kikejo.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/87279997245.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_off0000b116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB116 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC928 14656 bytes
SHA-256: ece9d53dddf9b5acff081d3d6f9accb24e61c7ec30af0a17966851fd0f651f39
font_02_sfnt_off0000edb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 10704 bytes
SHA-256: a6b885086c17b3b5e4b945a0449a4ee4dadcd543937fa8ff7b3d58accc12f745

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