Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01ef3b493349e96…

MALICIOUS

PDF

69.8 KB Created: 2021-09-04 19:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8f247e0941f36c8a05c4f31220105361 SHA-1: e341969249713ba144338c2668ae6645f1ef92f0 SHA-256: e01ef3b493349e96eb749a28d8a352cfc09b64cde14f788ef90254ad7c271198
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to other PDF files hosted on compromised websites, suggesting a link farm or distribution mechanism. The presence of multiple distinct hosts and the use of form-upload plugin paths indicate a coordinated effort to host and distribute these files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/78cbc5c73f583bbd7ef357fac25519e7/napukedotekuneri.pdf In PDF document text
    • https://kuzeyilac.com/resimler/files/17329626057.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ee775f457---wulolisewuguvazafupogigu.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611e17089e121---gixile.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/27799222423.pdfIn PDF document text
    • http://waypl.pl/upload/File/megarujimajixafinav.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/81614408494.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7da38c37d---45552866020.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/6u41lkmd6j3pll7co7cvgu2b76/temozosuverawixenumonu.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d0934a55c43---72181171380.pdfIn PDF document text
    • https://dvg.asia/ckfinder/uploadfiles/files/20869989346.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e88b955949.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/45091407618.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/90674010208.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/51049091511.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/37fae5593e6cab2436f4efcea00e6ed2/79831495428.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/dojitu.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/49274331345.pdfIn PDF document text
    • https://digireg.ch/upload/36272129458.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d081c972---93839182590.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/67578853496.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aa400f5fa---56251411987.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/52322394348.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d329a33bd77c9a3164dcb892babae6d1/94228072814.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63062352710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=atmosfera+controlada+en+alimentos+pdfPDF 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_off0000b42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42C 14992 bytes
SHA-256: 30624baa0fbb5c0bd14a51045163843d45ae681c93eda146f4df93f875b8b2f0
font_01_sfnt_off0000d8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF115 10760 bytes
SHA-256: bf46c9e02c2e33d3240bfb97688c70ed588b1d5c760b1f1a65ea5db5355a063c