Malicious PDF — malware analysis report

Static analysis result for SHA-256 7095b8ffa953d21b…

MALICIOUS

PDF

93.4 KB Created: 2021-07-13 01:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 1df2d1fb0decedd077b83ae3b8e759e1 SHA-1: cd9d7cf7fa961fa2c0b081c86611df3651dffe10 SHA-256: 7095b8ffa953d21b29581c627b4f72817e85d8f8ae398e49ea076d1fc98734fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ordinate-ltd.com/file_media/file_image/file/44115840762.pdf In PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608ced57cfc7e---16078396991.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/96670849508.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/bacc9575966bbf5e63eda1738dc6cfb4/mogisalemazojazekamejo.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/mukun.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83bce8761---43719832737.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9b9cae876e46aefcc406264638e758d7/68535404046.pdfIn PDF document text
    • http://indianaquesters.org/clients/9/95/9573c8d6e108c9729a37356986dd5b5e/File/labowugegeduxi.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/takifon.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8711ad5ef6a36da5ad0c3e38d449dd6b/misiwemasedimoguvejoniro.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/gojewo.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf4867a7b8---riwezakiropat.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/wobunikumomitusezaz.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754e14aa51a---97937689823.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b12859447---nevuvoxokafijebava.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kimagi.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9443b37e5344452b1be7b8720329d7fa/54378504721.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/54947071294.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2b9517d81---badixoxaverumiwirige.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/kojodubisusojolutixori.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///jigujefadupumu.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/gobubedagogadapafokaxel.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/mumudi.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/13678926803.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/ruriwobomelifuviwegibamu.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e99a1695d---rirenojogokaxokigege.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24c90cd251---74804417865.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/janezewum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+level+up+fast+in+skyrim+ps4PDF 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_off0001069c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB3 11044 bytes
SHA-256: 827fd7e966a02af2f18c192a0f39efad4c29efb3267a327dad56abe55420b5c9
font_02_sfnt_off00013873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13873 17980 bytes
SHA-256: e365080804001475a4548353cbd17255e23c51d034c3f716e22e027869f35b4e

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