Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f4f7b6d0c53a54…

MALICIOUS

PDF

86.4 KB Created: 2021-09-16 12:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5277383b1ed7db94a66c2fe0ccd98697 SHA-1: 06ffaf10b62d60c410d69d5c3a450ef3d471cb35 SHA-256: 32f4f7b6d0c53a545c922d3fd774c211444e7bc9b6dbb2c52e08a05df56388ee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, with several pointing to compromised WordPress upload directories and other disposable hosting sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://izeninfo.net/admin/upload/files/zanawojazufoxijuvowuzi.pdf In PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307de54519a---mofisigutil.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/pifejis.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/74809778470.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/2143191523.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/wuvebup.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/wumizadozelojojilanokot.pdfIn PDF document text
    • https://moolans.com/uploads/files/96071763116.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/ragigumoxepim.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16140efca0d6b0---dewasapevatunolugud.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/subokomosojanafiduvav.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/15334819733.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/nagojovonopikoma.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/kujimivokenowoxukul.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/5052993093.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/nigiguziki.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/05db3f0281edbd95579584e75cbf5532/takizepojuwoxibibilafide.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/titek.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/28406515668.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/1358380539.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/mamudufizedijenefugoxax.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/wejupimipuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=best+guitar+tuner+app+freePDF 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_off0000ed97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED97 10520 bytes
SHA-256: d86eeb8a6f31529d3bbf934de4738b746029abd6eced1d46274fb8c494c41a12
font_01_sfnt_off000105b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC6 17800 bytes
SHA-256: 9de23468b37a565823717b375089ece5175cd483272314217476bf5a259a6038

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