Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab9c13828596d6f…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 14:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fa16a7add4cb561a3f1dfd63dc990b42 SHA-1: e2a4dcf5e2a0ece7cb0ca9afd4c920ccb6c482ef SHA-256: dab9c13828596d6fa88001501769263a625fd3eaaa7e47db20c346f3ece1ea8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm. Although no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, aligning with the 'Pdf.Phishing.Trojan' ClamAV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134b852317ad---84894651276.pdf In PDF document text
    • http://naoshima-habitant.com/images/blog/file/naviwuzexire.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/lutipa.pdfIn PDF document text
    • http://langmypham.com/luutru/files/geriseneraxuxixo.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/0853ec.pdfIn PDF document text
    • https://fivetc.net/uploads/files/70031386472.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/vesakixogetebejosun.pdfIn PDF document text
    • https://businesslife.com/content/files/satikilexovegapap.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/newine.pdfIn PDF document text
    • http://www.moyekolodin.com/files/98465957935.pdfIn PDF document text
    • https://kawanmto.info/contents/files/xemewuregewul.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/rufuf.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/95711698635.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/fedewasizixebibovewevaku.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/fefuxavesajazasimalox.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139696d8fe7c---47241488925.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/18872364484.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa831e03c7---14307585541.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/lovazisuvad.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/35808579334.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/woripurorokifitimevexadu.pdfIn PDF document text
    • http://instalace-charvat.cz/userfiles/file/tumugofuriziv.pdfIn PDF document text
    • https://subded.org/userfiles/file/62109915210.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134bed04ffb6---manofosawisozuroter.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/zevolibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=harold+and+kumar+go+to+white+castle+full+movie+123moviesPDF 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_off0000cc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC95 11600 bytes
SHA-256: 9fe2688af8ece18b825a546ee853a7fa5d0bc6f040cb1ef85b2cb7530a1eb49b
font_01_sfnt_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 18312 bytes
SHA-256: 8aece5bf726d587d2958119f5d7e458c8d3cf75d70893a8eef8bd834244845cf
font_02_sfnt_off0001178b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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