Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0d64b3f4515148…

MALICIOUS

PDF

73.9 KB Created: 2021-06-29 03:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: dc4c86f98c55281beab82c55aa6a404d SHA-1: 543726af3fb5c704b426ac9df4eedb42df8a3e03 SHA-256: 2e0d64b3f45151488c77a353bf30a02a5635db45cbb92d0516a70a3b9dfea424
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites hosting PDF files. Heuristics indicate this is a link farm designed to redirect users, and ClamAV detection confirms it as a phishing trojan. The presence of embedded URLs suggests an attempt to lure users to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://chcial.ru/uplcv?utm_term=convert+pdf+from+one+language+to+another PDF link annotation
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/od91ijkeocvrh222d4tb7lmjli/rirelerar.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/29go4slkbld1jp3n8k66hq4i2p/51479226987.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/bdde6acfc88acf7c870d04be44a89802/84255746329.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2199859b1---ferivovawine.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/68860891314.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/v25a99ft6cii9hstarkqrn42b0/lofepofal.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/9ff286171125d68134b8d0ed8bef1ad6/jenesixupiti.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078e896aff17---46716647042.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/f50qalhc1t4b5vsbaa2eenl8o2/3504956175.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/fepele.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b1a36e78e---88517820538.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072d0fa08f02---27569800775.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b754af036f5---jexipoxodumorop.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/mupeniduputinefenagi.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/93116177988.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/sawaduri.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16077264fc0961---88196919317.pdfIn PDF document text
    • https://mmszke.hu/files/file/kalenebimulo.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/99722266360.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2d540faaa---jabatovun.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fecebb4da7---zejabaguvazuxuparidu.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/biboruwajekelejukexak.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/c37aab1a1cafe9ca4aa1d0f01a3c86b8/mejobuxivuduzikipozoler.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_off0000bd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD41 16740 bytes
SHA-256: 391afe2037c9cbf54e9b70be15485d22afe44cd38abdf9b013c48925ef713b5c
font_01_sfnt_off0000e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 10884 bytes
SHA-256: e5bff4a8b1949a229510192428292f3200274ac98761187fa575eb995fa68521
font_02_sfnt_off000101db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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