Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f046e46303f7d8…

MALICIOUS

PDF

87.8 KB Created: 2021-08-08 19:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f2883202a702361adff9039ae8e6baca SHA-1: 43c4af1c85a8ce7da6cdebbfbb2e297b3c7be6e8 SHA-256: 26f046e46303f7d8a13707ac54cf753be6d79c956148fb3f7ab0fcd01b4ac232
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm or redirection scheme. The presence of 'utm_term' parameters in some URLs indicates a potential SEO manipulation or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c16605bb2---tidusekodibidokutok.pdf In PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c2c5d91e1---mikoz.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/50962455524.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/55235218365.pdfIn PDF document text
    • http://simonide.org/userfiles/file/mefakusapizadizajute.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef58c5bdba---36779349868.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ee6c939e198b8703402fe72731566ffc/60607419189.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9eb69993c642b2ea878f1310bac3272c/19968175839.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073ced6d0aa0---refevoretamapopulux.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/80903407108.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/98f40af34d1ccf7339c25b98fe111291/vibobenegovudebininexuni.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/48612285790.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/24e157ecbf0025a620e28daf27423eea/napeseduri.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/tisopanomosog.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/21dc3d8586b24cafbfc0a1a1c39670ff/24313067963.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/wafanusajenibugaled.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/29938596594.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/76739147395.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/vufizikepanonu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/95716b785a9eb5c417090eb1c51f74c6/76645112773.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/50934699297.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/sutiladapugim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+get+more+followers+on+tiktok+app+freePDF 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_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 16612 bytes
SHA-256: 711fb67c606a512e8021b45582622c7cda4715910d1c217cb057638cc407d8dc
font_02_sfnt_off00013891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13891 10872 bytes
SHA-256: cebe506653bbfc0f4256009c7340c8ed637e60b6d9c431f567b8f5415ab083aa