Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce1555f94d25600…

MALICIOUS

PDF

87.3 KB Created: 2021-09-10 04:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d0294c74c0fdc78bd85672c22be3cbf SHA-1: e5c61d5c5d1c87f15cdcd2b50e8bda43d47d69ab SHA-256: 2ce1555f94d2560040b06c4f8cc9824ee7a2bd4aa0cdbe46bb8b5111df295159
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and heuristics strongly suggest a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.dogwoodagility.nl/ckfinder/userfiles/files/salitavuramofunogedufu.pdf In PDF document text
    • http://tucsokszekszard.hu/images/news/file/76437476363.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210901181308.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/nititufivatuliki.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/42373223722.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/86068505367.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/jijuv.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613504260bc6f---61739772184.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/vobot.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9d1796a27---xiruledumuz.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210903032813.pdfIn PDF document text
    • http://leguido.net/files/13007051639.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16138f8a093190---muwugokar.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/92145940908.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/olmvnsins97v97mskf3a48f740/52174223433.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613961645388a---koxoxamuwotumadesifopoji.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/xiruximobus.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/2885001229.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/suvezipisurewuju.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/37457331357.pdfIn PDF document text
    • http://chinalabware.es/d/files/85296850237.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/xumowarusokojubu.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4db08e15d3c808e6abe6796275f6afd2/74023915249.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/39692759513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+open+ics+file+in+android+phonePDF 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_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 10796 bytes
SHA-256: f5f5214ecb70612f2e5eac42d3c76fdb1002979d833e4da9312d913fd62b1af3
font_01_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA8 18592 bytes
SHA-256: 6e862e9ae781f5157f875d08497ba72babcef2c2f4b0471a192092ca13f1bb84

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