Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba567fc816490a34…

MALICIOUS

PDF

91.8 KB Created: 2021-09-16 01:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: dd0620c82ff387c6cc6c40dedc3a050f SHA-1: d6532461f3f3ece888f697a980b910327ea1585c SHA-256: ba567fc816490a34ccf2a415e5f3d2c661eb037da22feb91135bc2cc7a4426c1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://garglob.ru/uplcv?utm_term=call+me+by+your+name+pdf+english PDF link annotation
    • http://classiccar-jp.com/js/upload/files/zoxifawe.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/zixelukubajadekumepi.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/23293003346.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/18297069803.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/mebeputaxopi.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/74061048612.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/40932620416.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/lubefezo.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140473eacd53---didutumenof.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/90653139460.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/2257007328.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/87468099544.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4874dffe---tisusibo.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614163c23c411---kelujajadabu.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/92484664688.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb79a21393---potuposozibubazup.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/42595477275.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/3e29f3eef9056543f7918ead0c6d616c/xeteretajagogojow.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/20100795926.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/30548925996.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/c010e70280815083cac22768ea2448b9/61821549012.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 18244 bytes
SHA-256: 2958ba27c88e9adb5bab8941e7b54df2fd84f76c17809123587e0a9c258ddf93
font_01_sfnt_off00012fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000147e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E3 11232 bytes
SHA-256: 12c8dbc6068121c56b72b51d9958147591d8515c423d73edf4715b9faf471b22

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