Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02327192bf3e6ec…

MALICIOUS

PDF

81.8 KB Created: 2021-08-27 11:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c5260f848994fce62aa0e0a3c1d804ef SHA-1: fca7b59b7b01d6522ee2f6f27acbc61f95aeddd0 SHA-256: d02327192bf3e6ec5778c76fd40aafb0f8d530eb3e8d361f7c4d3080a46519b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content or phishing pages. The PDF structure itself does not contain executable scripts, but its primary purpose is to facilitate access to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/8fqqsklo79siu15lv6b4mfd763/47871381006.pdf In PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d1396222e---ketazakajarujitoruvipijuz.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/jetupixizipav.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/furudotexudami.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/zopavipe.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/7798813605.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/rmh1jn8q73oiffqrtqjiac8k22/nosufaw.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c05e66709---saxukup.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/gisevife.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607608ef78cd6---gimowejerimodedukile.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/2fb7ec7f08d250a80c93c7e58b203b0c/37918160938.pdfIn PDF document text
    • http://computerdoki.hu/user/file/85045727496.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607633f3264cf---topasuv.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/vixizi.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/63686282820.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/75400729288.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa4f351b5---77024122038.pdfIn PDF document text
    • https://hanmarklight.com/UploadFile/files/83855413742.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/30357578091.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/zedapedorekige.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/72138574090.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/80ac725f3799db47ecd3e1eef6038e9a/72620005949.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/52523131359.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/46934012610.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/gepolowonikomegogugu.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/mezulidabebona.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/nuputidumusugisezikesij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=situational+stress+examplesPDF 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_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 10692 bytes
SHA-256: e4a6ce06c55643b6021ccbccea1251110a72f62cf0ee7ec02ab3b7c5f6272bf5
font_02_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 16428 bytes
SHA-256: ff198ae6692b6738fe4f7edae6e1631865644adf5236d88efa043dc92099d74a

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