Malicious PDF — malware analysis report

Static analysis result for SHA-256 868230409746766e…

MALICIOUS

PDF

86.6 KB Created: 2021-09-07 20:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d122cc5016272d83531c8993235a698d SHA-1: 373af26f60a6dcd87e4b14b9298c59cb692e1d95 SHA-256: 868230409746766e8407b169387023f52979a37f38c9d2e697caa925891ff5af
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/4b9a1fdd30291e6983e505b596f0e664/40848934380.pdf In PDF document text
    • http://amirafouad.com/uploaded_files/file/tamexizij.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/gonobuwe.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084d32351037---fomisifurefotamipowuwo.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/85784300227.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/48342702da6a97f452e3c220fce46f4c/27261415482.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05cea48edf---69577156679.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/monojobuligofubovisarex.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/junamu.pdfIn PDF document text
    • http://vina2002.com/uploads/files/getevijekuzepog.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/22166832567.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/boxuzid.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/90dd923c9cdd2bc6e011aa21e9d62b72/joxuvogebugifuwifeke.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/96343460034.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/tuvasufekad.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/51948534927.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/japebupovatosigapok.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/3f28osfjfndjnpqselvsns7ii9/83271262739.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/nisizofusobolevobi.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/9953229582.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/gufiwekamik.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e7a9f695b45---16093862991.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8d2185901---59894699879.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/kuwulisarikabaxij.pdfIn PDF document text
    • http://sam-global.info/files/file/mesuzuvo.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16094604805f91---bifawifisapawepozodume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=paranoia+rpg+rulebook+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 10740 bytes
SHA-256: 7803e70e8d9293f97c05d5d83c5f6806695257f853831422a1f03e2a3bbda0e8
font_01_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E08 17684 bytes
SHA-256: 605c4806e4c2cdbe2abdfdfeae2d99982fb0a483bc2a2edd7e962ee66ba2a2b9

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