Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ed1c554a0d9329…

MALICIOUS

PDF

92.0 KB Created: 2021-08-04 13:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 22fb44229c76601995d2e5f7b6d6782c SHA-1: bec983a098afe1f3c188bb76b4e804242afe3a6c SHA-256: e7ed1c554a0d932944792a37544e94477df041a37fd357a8ef0f049b4884063f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body was unreadable, so the primary evidence comes from the URL analysis and heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=chaar+sahibzaade+full+movie+download+in+hindi+khatrimaza PDF link annotation
    • https://www.corpeverest.com/ckfinder/userfiles/files/73591225100.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/zarajef.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/raliponuzorufo.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086abbae9bd2---81414089786.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/godevizowabot.pdfIn PDF document text
    • http://wwstationery.com/files/file/30861358005.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b8ec7332a---92748318847.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/16023472058.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac09b05ea---49669416696.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d5b31e2e---tupixiwonakukafulajaji.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/64efc9a1205d0734bfb2fd3d29c5d7a2/85143816492.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/59606285217.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/3c6d369dbdf017180b39e9bb59785b16/lasebokekefubesij.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/jozemo.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/p141ahkmr5f839jbfrfaq2knc3/70395532636.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac1ed94971---26287634437.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160838ef07c08e---xasisasawigu.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/46064299327.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/73106936958.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/nebedowumibuzomemugijus.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c68cb878b4f---11912091642.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/n7v2i1ltppvefcalkrcva7m3rl/wonubete.pdfIn PDF document text
    • http://congtyvima.com/images/Download/darisef.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001040f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040F 17256 bytes
SHA-256: 0d306294d3233c79622a089a22ea843425f5ae6b3fa38aadd1dabcfba1b39ec4
font_02_sfnt_off00013170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13170 16116 bytes
SHA-256: d74cf48de940ac729cd258cce0a55aab032f0e243ee8387f3aba300b52ed0121
font_03_sfnt_off000146ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BA 11196 bytes
SHA-256: 42eee9b6c877d09efdae65dc8fd808c3580e4a78c41fa6f33d4943a7858d92aa

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