Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f47848e9dd27fa…

MALICIOUS

PDF

79.0 KB Created: 2021-06-13 18:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f61216b39ae5fcf4cc3421f026b0eeef SHA-1: 9aa106aa6ef5b2c391b534985f91f23afb9f7f39 SHA-256: d3f47848e9dd27fa3d5b6013b347a9f5ed3f94c64becfcd8d559ba57c80bc98d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains numerous links pointing to compromised CMS uploads and disposable domains, suggesting an attempt to redirect users to malicious content or downloads. The presence of a link farm and the use of compromised hosting indicate a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=the+l+word+free+download+season+1 PDF link annotation
    • http://celcg.pl/uploaded/file/vevizola.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/gq983gclngh6ouai3evc4qhg32/52288650100.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/n35hoitknbf90l1hu55d47p42b/63990727012.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/numalifokajonutoram.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b950a0c59fd---sizeriduwax.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f60cb080fb---30347953897.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/puputotulikovowul.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/cammpe9gme2enur8si7o3qpuf5/xezinitasonarudezasujuvo.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085725a92f57---89366309253.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/badabufixefasol.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/l0s5k862pc3el2acj0jqmdnnfe/mopasijakeremulezuwogar.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7b9q34k0j31766nga7af5fgl75/24340219959.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/8b5a21505a69e7b51324bcfdc5265bd4/30129175804.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ggilijjohl7ujksbdatd5o6vr4/10131032960.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/c69ug517p5g3brng9l442qhtoo/59697062879.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/61ea771abe0156b841a2ea3532657f54/juzavojisodinilipenopowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 5088 bytes
SHA-256: bf7483cdedb760f2be61974c20f5d071173b721636e0f7c148dc23ab531f6603
font_01_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 10716 bytes
SHA-256: eff0781204cfd1b91de0249c6f4ca8aeb102e504b795e1e861fbb824cf3be257