Malicious PDF — malware analysis report

Static analysis result for SHA-256 665ee0909655a2ce…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 04:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 74068bb59abc0b5da41a8bbdc2fac21f SHA-1: 69d8c75b23baa8b5f9cd8d6392531cdc5b287131 SHA-256: 665ee0909655a2ceb4c9833d372b0451b38edc11fc985b1b7b1d143e32583a3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://drafthe.ru/uplcv?utm_term=prefix+and+suffix+worksheet+grade+1 PDF link annotation
    • http://aquatherm-graz.at/files/bemadijodivokozaxekidowik.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/sogovero.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/96951212644.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160820f0223b0e---fimupomepizari.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/talikekugazifozupolis.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/f3ec7f6eca24cb554036ce2d8724a029/mikuzevasulibiwujileset.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a8640b2bf---26742226931.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/97584480534.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/75064013806.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/22095698058.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/e3b2db2fa08f8ac205e828d245aee938/32552992834.pdfIn PDF document text
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/gaxokafekurajivirotaji.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/7d8889e3ba470e6fb8c71c348c45fcca/47274176474.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/73320724255.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/ponunogiliniw.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160771cf7368fd---xatetagu.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/39685879552.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/63s14ogmlob3mcoq7n098e1ef9/91144772073.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a4f9a3398---99070148789.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/8a8a81c106452f0b66fec8d176b91626/85314380853.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/54666332962.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/70930735529.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/34139656052.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/ac14b03f84a8c36ba58b0ca944c4c143/togesebulog.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/43152757126.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/subozudit.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_off0000dc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 17356 bytes
SHA-256: 754dbdbd7177e725751d490f3652d726409c0d776ea8eebdd453c38f9cd270ed
font_02_sfnt_off000120fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FE 11020 bytes
SHA-256: 1a88be18e863180b039464c13d786ba6169583aea5cf803d53fb27523adf50e6

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