Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7ce5a1e8671d2a…

MALICIOUS

PDF

158.9 KB Created: 2021-08-09 22:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 30fc9ea7a994424686b4eb7b6cb7b66c SHA-1: 12b97cd65d5f6d2042c4bb8a6f8d6afc09cb1e7b SHA-256: 1e7ce5a1e8671d2a81f4231c5efb68b85371aec07374346bc421edda8be8710d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to further malicious content, likely a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fundreamz.com/ckfinder/userfiles/files/89832940913.pdf In PDF document text
    • http://www.gdchgs.com/admin/img/files/52996514781.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c76c7651ad0---petodonuwujewaxufemeku.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/1nm5ul91nokni9uhmb72hcl485/96262918433.pdfIn PDF document text
    • http://capital96.com/userfiles/file/ralazaximaluwusofuj.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16093c2376f1c7---vodowanabiwetitejo.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/20089bc7956eff9ae48d603a9b3ee682/gegenoxa.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/11739137979.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/e03bc9b70a97020faa2688667d9781c6/lidimit.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/jatojilutejexunigofaw.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/63472694321.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/24388157399.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/57115866734.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/moxovor.pdfIn PDF document text
    • https://www.micron21.com/application/third_party/ckfinder/userfiles/files/35587165775.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/kepuxavuvopukale.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/fezowe.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8aa850123ca547297adaa2244b2d2e5c/vaziriwisozef.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210730_094520.pdfIn PDF document text
    • https://orrizon.ru/images/file/32508858850.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/e520f709db2635b38b4c1eeb7010f342/larut.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9ebc1a1aa---2772131429.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/67039083221.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc67b788e---fibowavadajezuzubad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=staples+laminator+17466+instructionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE35 11060 bytes
SHA-256: 87e6af49cedee85afc172eb242a39657410599f83e4a210fa9fd03cbe398d057
font_01_sfnt_off0002180e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2180E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002301b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2301B 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
font_03_sfnt_off0002384b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2384B 19908 bytes
SHA-256: b3d1aa611a284ccf4ba82e743d7020def79f3ab2ce3a4ef9cbc2b802e0c635c2

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