Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa7d9e540e222f3…

MALICIOUS

PDF

104.4 KB Created: 2021-07-08 06:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4c813f214d878e45015c2d5d417902f8 SHA-1: 2c700824c25bffb546657cf64633245f3731dd40 SHA-256: 0fa7d9e540e222f31320f991d809b7289b056dff8db0022d97d0a12cebac7adb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to compromised websites, likely serving as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, with the document likely designed to redirect users to malicious or phishing content. No scripts were extracted, but the presence of multiple compromised CMS upload links suggests a pattern of hosting malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/jv5snc5lhsusengg6sl3c8lkd7/65704606342.pdf In PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7057efbb93d89f488a3c00538a4a0723/duzugameg.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777903b324a---87113361406.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/2106284947.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc316ac1686---7309852944.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/b019110461bf5c3be64dce11189d97f2/mejexu.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0148a8efb4---79053489062.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/3d44aab2f1dc17943b51a33494578723/17209467803.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/609dhlmkv2vc1ea2kntlc1g4i0/jofotijuv.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dda9b11cc5f5c8149292996618e97cb/fanozuwadolamubidu.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/08c0303d948ea85960d6e61025a48d1c/kovogokogep.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608180c26363d---saronazazewipapotoja.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/oc432lf1e7a53n8mmprgog65a3/fokodixumafavepawisesos.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7214e10903---14463699570.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ltiffhikvuhcfqqddo7p4qqh06/rimiwatudevarapar.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/xenagogitejujak.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c03c6a5c1f---58704267414.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/fefipomufemazizop.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/38486850000.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/16224524301.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d33657c84b93ee20f9cd7bf6af68b26b/vileditediruk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=cloud+computing+projects+pdfPDF 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_off000131b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B6 11060 bytes
SHA-256: 76f70fcc0696043a1ddcf94b59aa42350e1055cbd2e07fb9c5bbeeeea3885dd2
font_01_sfnt_off00014b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16345 18116 bytes
SHA-256: 94e05855e4d4d144b9d136a30d747bf6efa2098b485e5b5b0929e94234a370c0

Open this report in the interactive analyzer, or submit your own file for analysis.