Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fb3e190a507f1c…

MALICIOUS

PDF

83.0 KB Created: 2021-09-22 10:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 97253f81d1a6ad8ff1e749e2fb6631bb SHA-1: 840b9da5bb2da8c2d5217be86863e194541925ab SHA-256: 96fb3e190a507f1c8ee70b54cdde9b993be7951e702ae0ff59ec107b0e39532b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous domains, some of which appear to be compromised CMS uploads or disposable hosting. The primary purpose seems to be directing users to phishing or malicious websites, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://catamma.ru/uplcv?utm_term=watch+fifty+shades+darker+streaming PDF link annotation
    • http://litroshaber.net/resimler/files/1784498782.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/5625284258.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021091516132973499.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/tobawalivusaj.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/93301583436.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7drvgqae2h3v0busmlkp3k5ka7/sarojasinamifo.pdfIn PDF document text
    • https://citrasas.com/ckfinder/userfiles/files/98915962512.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/novawutowabugezus.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/fccp1nd3gq9pc7tvg1a82bfa91/27125951052.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/luxufil.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/bokikemij.pdfIn PDF document text
    • http://salt17.com/userfiles/files/letomonoxodugilitaboto.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/37897635339.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/22605028308.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/86216057436.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/jifafila.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/64385504617.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/ladixo.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3d8ea6108---fivaxidusevuf.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136149da7e73---zurunikuwutugojarajado.pdfIn PDF document text
    • http://cabini.it/userfiles/files/31121357860.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/morawekelisetinozegi.pdfIn PDF document text
    • http://boq.internet-match.com/upload/files/47386700183.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_off0000de08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE08 10956 bytes
SHA-256: 3193c640c66dbb58f4e9cf6c6f9a4a23909fc7f2948df5fa5f2a55b5b799786b
font_01_sfnt_off0000f721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 18040 bytes
SHA-256: dfdbffcd4ab50581ae72fdbfddf6582f3d7ccc752e6b7613c7516da021430059
font_02_sfnt_off00012659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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