Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87fad8ee9e31ef7…

MALICIOUS

PDF

72.9 KB Created: 2021-07-13 21:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e27428f19f53ed4ac3b1c70e8b7f9902 SHA-1: b9b7f9c3ef79cb7ea0f2695e6913371c59aa44fa SHA-256: b87fad8ee9e31ef756e3a2275db15c310d215130c1dfefffed8e62159a0c092b
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lure users to malicious sites. The presence of multiple distinct hosts and a link farm pattern indicates a deliberate effort to distribute malicious content.

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 http://abwmountvernon.com/uploads/files/13301841590.pdf In PDF document text
    • http://backupcenters.com/userfiles/file/nakelapelorujalikisu.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/9a2da1a67114820c035a6793068562da/3986620172.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160934dd6ee4fe---81810919944.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/io9n0k31h3lmtjps4l8408mmk7/5342313751.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38057aff5---vikoxapizokatam.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e61ac7f3553---tudefatifelorupodorisufar.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/xosug.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/46928681041.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/92885446390.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/terapadorebivixekatoko.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/faponamade.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/1734280644.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/13384575389.pdfIn PDF document text
    • http://jngf.cn/files/file/nerepaxaxujojisabu.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/225574c3b59ef32426f3de46c9313179/23635752217.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/87790744456.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e6d9a3fe0---60991430661.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/3e7df1c6f45a4e689af911c0e25c0c68/fadikisibevezive.pdfIn PDF document text
    • http://allasclub.com/campannas/file/sikanijonelojo.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/zilixajilifuvegomibinara.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/84573116254.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b04e4998ad3---30870807126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+phone+booth+barPDF 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_off0000bbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 10148 bytes
SHA-256: 95ee685ccd917152200f33b149bad8a3c4ec89d9604d3a5664006097b0753572
font_02_sfnt_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 16972 bytes
SHA-256: 967c021001dc52c384b54b0912de4e7cfbe6dd25f0b3a656df9deaf3a521dd46