Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92feddf0eaf89c3…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 09:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2edc07edf84d29946709035b20f2becc SHA-1: c88df519a6224dbcbdaa9d2a5c3cc83b934d57b8 SHA-256: e92feddf0eaf89c30de66e4ad2df1a8e7268b0c93f264cb3016715c852dfa577
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous URLs, several of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns that leverage external links to lure victims. No scripts were extracted, but the structure and URL analysis are sufficient to infer the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ghnservizi.com/file/51771159069.pdf In PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/2989456142.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/gujiramozixirejipuf.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/37563427433.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a042c30bd25---46394526467.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/kelonurejegupazut.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/tawitofoso.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/19c2cb5d5825489645850744b7c694b4/dasikujo.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/kisekuzulujeloneje.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/48303784798.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/babufeviji.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4923c7f907---pinowumomifozi.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e98v7tc2r6olr929sk54j2qmh3/86854470685.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/11633621163.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/nejivugopigoguvojuvag.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb34dc8964---98656596052.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/visojosi.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/tomudurepalezeg.pdfIn PDF document text
    • http://biosite.ru/images/news/file/rikifonulokerugusa.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/tojurirojemowalomajujowup.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/muxikadipuro.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/56180347787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=meshmixer+manual+espa%C3%B1olPDF 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_off0000e556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 17960 bytes
SHA-256: faf9f3ad4d90a155aa58ba2f6566be3d2ae5a0d29f78025caa190ff38d92cb71
font_01_sfnt_off0001141c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141C 10820 bytes
SHA-256: 69f41432438f3c2f5a076cc322bd569f1b4b22bda1f62240610e19dac123e572
font_02_sfnt_off00012c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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