Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ac96a0aa47745c…

MALICIOUS

PDF

78.5 KB Created: 2021-09-23 19:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 81691f91c31c3a0008835aa4bb89f157 SHA-1: e36bb06bbda38224e0a0137a1af4a768d442819c SHA-256: e2ac96a0aa47745cbb40d8870434017217097f57abefc78ad324c87179fab703
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern. While no scripts were directly extracted, the nature of the embedded URLs suggests an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/3i5k6k362kc4m74co7i1ninsmj/jedepojapesevano.pdf In PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/zogezajunugenititiz.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/17071403048.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/78945058636.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/fuwaralarupitivubatat.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/bapafikigexa.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/bosolopulanimaneni.pdfIn PDF document text
    • http://indexone.ru/upload/file/28831341873.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/57834851299.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/mepetenokezebopuke.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/8291852759.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/34744735255.pdfIn PDF document text
    • https://finliz.lt/i/File/zatusifidexuxexomilog.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/11803788719.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/63542779784.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/75254064206.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/gupufenopezur.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/656mvcearqvfk2qnoi94suh0na/74163182576.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109231448145840.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/25557949165.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/33800530666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=all+the+best+marathi+natak+full+free+downloadPDF 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_off0000c375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC375 20772 bytes
SHA-256: 21049210b47979ce8ccceeece3b218a2040e5a30acdad312d26d146f12c716e3
font_01_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 11020 bytes
SHA-256: d005f3d87b0e585f4df28caa3636c8eb6a09859e00fc6c388ca81f6e2c6c093f
font_02_sfnt_off000113f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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