Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d52bdabe7a09542…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 18:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dcef337973cc7aeea91d9fd826784642 SHA-1: d3848782d30db393be7ad08634b932788d3b442e SHA-256: 1d52bdabe7a095421ca0d31191404c7f70a02567cf1df4bddb9724f0172f6062
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous domains, many of which are compromised WordPress sites, suggesting an attempt at SEO manipulation or hosting malicious content. The presence of a callback lure heuristic indicates a potential for social engineering tactics, such as fake support calls or refund scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/blv9hj8a1rsoalrgk9alkd8g1l/jukowabupenupubota.pdf In PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/5363c89145f7c4128c03d877aef1651b/kagatuv.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/xujuzomupu.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fbddeedd4---kuripotofakevukopij.pdfIn PDF document text
    • http://hmed.vn/upload/files/16189792021.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160de7e477d307---44143390573.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/11d481e0d4817f6d1e307f8b5918f68e/xisivibobatedugul.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/92564166843.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc8051b2b---77097766280.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7af7359b4---53528555448.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/94600957837.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/kubonavoruwizagovawasase.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/wixapuxeginifezusevep.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fb965b1f7ffbe4c4bad8eb9aa1a93b5f/wexosilarurixoxipomuf.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/8286916550.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/02f1497259298dc969e2bbb48fe84c04/bemaloxaxuxesuwu.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/7edaccb0a13cb9b5a4522cdd99804b70/31640205253.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/8bcaca8dcd22321b8b035c65bd2ec705/63677163419.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f6c9d614d---dunatosexiwawonixejos.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/58134798436.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/57305060408.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a8776649e---sukejewabefam.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dbe14c12f---kezebagifanopesifavipefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=iphone+security+recommendations+data+leakPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE233 11036 bytes
SHA-256: c0397c23af43ee0da26946a4cee97a807bbce0a0113398c8467ed684ed448093
font_01_sfnt_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 18148 bytes
SHA-256: 7797c1994eb071a3707798f9d693a9966e4ba460a28c6fd82b338737a390413d
font_02_sfnt_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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