Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace65cf060be452c…

MALICIOUS

PDF

78.1 KB Created: 2021-09-11 05:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3293920865501694bf4a9160f6a5b38f SHA-1: 66d15611334bdc527d9b76178db1c05034c4deb7 SHA-256: ace65cf060be452cdcd5796d748ff9ead2dea0ec10bfe0fad3cc0921955ba339
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains. Several heuristics indicate this pattern, including 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM', suggesting a tactic to manipulate search engine results or distribute further malicious content. The presence of many unknown reputation URLs reinforces the suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3499

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
  • 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
  • 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://abacusnancy.com/userfiles/file/54474792504.pdf In PDF document text
    • http://alpha-th.com/userfiles/file/17616774.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/30672705667.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/jujimopov.pdfIn PDF document text
    • http://glassick.com/userfiles/file/95043336662.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/kesivexamosejavu.pdfIn PDF document text
    • http://grandviewcommunity.com/userimages/kajapivozujafamoporeb.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/66606665852.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/13967152379.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/88995591399.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/dafisis.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/dovesakanasinup.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/zutitigimekewekavojew.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/67657704061.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/xovalet.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cf32167e2---38828658830.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/nudemiref.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/tizonumipepad.pdfIn PDF document text
    • https://castel.ro/userfiles/file/lebenegakapesutogeximagin.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137af152d694---nomesogadoxiveloso.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/xuxomivoramubutuzipu.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/umus2qd2n4dv4199qlhrtqm511/89048047671.pdfIn PDF document text
    • http://taociren.com/upload/file/210904215034400126lgm38v483x7m.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=find+hidden+apps+android+phonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 10320 bytes
SHA-256: 9e46df89e011d25dfe9608e0ca844b83df1bcf3b88de22ed3e2d74b4f03ea5b1

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