Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad7b629db85bcb3…

MALICIOUS

PDF

120.2 KB Created: 2021-06-24 23:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 008c1ae65dfe19953e910f95cbc5180e SHA-1: c1bfcc01ebbecccc117adfc1e3c539ff7905fd6c SHA-256: 3ad7b629db85bcb3f7819ad94503b003ba64a2d0dbf2b8890c5d6f12cb30b69b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094688e3efd3---ratugefomigixulakim.pdf In PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/cd4thk7kqp2p0ri1lnjt073upv/zagugedusibekomubivip.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa2c46cafe---23438055797.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/rikebasonasez.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/74247136982.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810628313c5---83678027764.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c71ec793cd7---69133457334.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/nuwubaginodemare.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3012401fac---66342572065.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe3638a831---3318810480.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b6c911ca1---65883430941.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-22/20210622191353696853.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3ce5e24e6d039b0cc3b3c531aef31176/kibivepaxazas.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae530922c68---kemegekebureluzuxowolok.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3b997be43cf2a92eaab48b866094dfb9/77562035490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=convert+350+f+to+cPDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6A 6416 bytes
SHA-256: 62deedb54aaef669db635f4ef87d4bda5d475a8bf20633d6b56d9e4ab12fd410
font_01_sfnt_off00015c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3F 4852 bytes
SHA-256: bf03d89db941e9f3de95b428effba58befdfc1fba179f43a59cfa4f0e4bf1e01
font_02_sfnt_off00016cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CDF 10868 bytes
SHA-256: 1c6e4a0c7b1d153a3b08a43f3d582220140a0f3605bcceb90aa3d4e4a8763795
font_03_sfnt_off00018fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA6 10864 bytes
SHA-256: 6e2b56d0f7fad2112a032b3bc5bf2a916a4575a986df615bf215c0cc54b6a48f
font_04_sfnt_off0001b4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4E6 16488 bytes
SHA-256: e93fe25ed65c0de1917ea157c46e0d36cfdf16ae08d3b4abd40af5365591e542
font_05_sfnt_off0001cb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB37 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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