Malicious PDF — malware analysis report

Static analysis result for SHA-256 382cad341915cb08…

MALICIOUS

PDF

83.9 KB Created: 2021-07-21 05:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c08ef66469a1f84253c93742b068faf4 SHA-1: d03c338f8672508ba482c1cf96f4541416a3aa43 SHA-256: 382cad341915cb0834fe0ed51f25bfc469e11d895f958b95dd6e01b7297f2e6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of numerous unknown URLs hosted on disposable domains further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b8f8470ea---rugibapuramaneravun.pdf In PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c3fc5ba34ad7e5f772862bc22b8c6e4c/52239071210.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a43dd6534bcd024e62df0d1eec1080cf/zovinosijejudor.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/93804613791.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/xivesobagugizo.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/bowamonedibo.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/69856465709.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78bbcd80b---6593953188.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e46c771bd---22902447302.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f95d1751a0---67742768023.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f83973ea5d---27251863811.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/11597604528.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/55132082524.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3e6a8d24---49256305683.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e65f91a159f---fawiza.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/luvijejizasasi.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b558196651c---wisuvuvebete.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7b09f273556944a2b48133dbc7d9d243/55107427669.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/52950171614.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/36972557423.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/lunadifufoxikazodusog.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/nidovezibefazufolon.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/64193484213.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jeralkhi1tvck8tvuddii4iv47/74733100444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+draw+teethPDF 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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 16748 bytes
SHA-256: a37dee922686e52238573a084f3a0922d4c12e76e2b35ed19095ce81fd41dd25
font_01_sfnt_off000112d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEE 10012 bytes
SHA-256: f51b4e6ec131f229025fc5903f4e8a2ce1facf130843c21c2703ba802a398016