Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d23d3ddad5ee115…

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 01:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0ba6077ab05e852ac3252b0c002436eb SHA-1: c867ef6aae76a13c5e6b2f4873a74f32059c4d4a SHA-256: 6d23d3ddad5ee1155b81059cda41a00e7b1a93505f0be0ad9f04e33e52b0f18c
164 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 contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites acting as a link farm. The primary function appears to be redirecting users to malicious destinations, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/f0016d07780fbf297697536f334a4c47/rafonodojolomim.pdf In PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/79c293abdf1fa4b667eeaa0ba62766f4/loxodigunuputivo.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/kometoxotoxafo.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfb518d587---59781460046.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/27393551085.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/zomulofodebala.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/sifalikitemivejiki.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/e3ce268f48f0b044ad2b514b5c123ffb/wetuvijutedep.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/feb7f279accbb3ce55c009ac02e13fc2/jufexevevowoja.pdfIn PDF document text
    • http://lg-palette.com/upload/files/67122000031.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/juralaledanafukitubigujod.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bd803f5f06ce25e3168e7cc5e5bfe1d/84814833309.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/tovasim.pdfIn PDF document text
    • http://theultimatemarketingsystem.com/survey/userfiles/files/77931126682.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/44177022618.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086fe177f879---96473035433.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/32341972142.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/rekevojunu.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210526132052.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/xofavebepurozuvaje.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/tigiforopesokepekizabiw.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202108192103278082.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16119b78c32d66---jifegivafofewedoxogoma.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/a8549c3f60b4ca336b5e25e737cba0ac/34148671498.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/1nbcsppvhcf1hmeqahlrkvinh0/47775389110.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/23917577086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=homoeopathic+materia+medica+in+bengali+pdf+free+downloadPDF 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_off0000bd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD67 11116 bytes
SHA-256: 62e8a21ce5d51fa7191fbf3f9952f8b66de157bb3dd25cf2773dc2476673c700
font_01_sfnt_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 16180 bytes
SHA-256: ec0e7d3d678c4e7edef95c7365ea60563920422ea4ba8c071ae3965cfba11bd1