Malicious PDF — malware analysis report

Static analysis result for SHA-256 76feb4c91891742b…

MALICIOUS

PDF

90.0 KB Created: 2021-07-06 23:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2b56e3c2e80c7ef4d9d96a96208f4f17 SHA-1: cb83d168e4c536d291d9baa8848f7d9bd6d012bb SHA-256: 76feb4c91891742b8d7fd0bc7647cd9a4a0e8dcca8dab6b4321a5b60ac118011
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised CMS uploads, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports its role as a dropper or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://businessnavigator.in/ckeditor/uploads/files/fuwanesutefum.pdf In PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/4166c909ae2fd7776488ca56a569c7e2/tiwidifikikojakodoxiwam.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/8429401346.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e45d4e37b86561a5e33341569cb0a61d/livusisener.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/13459381691.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082028ab1746---bujazona.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/ziridewarupibarexetasom.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ahprhd7dliea98qlbkvadsbkg2/farorifirapuritag.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607965160989d---difaxo.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/129ac817666c1c719b28b29c80b64a96/77320109978.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c0fddde9be9044a62ef3f0ec2b1cd9bf/wimematuzol.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/jegaremadatulapozib.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ff2b4abdc7741f0983eb089c0e49952f/kexesafol.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qp59u69s2bta6nl8dum84oput7/45273466837.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/0d04fdb2136673c48fd75ca975d96296/fejuto.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b69dd61cd28d625080f2dac3f47c6a0f/5724876867.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a37c6e0322---mapomejavodubozuduvar.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/dufovasojavusuje.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/d70bac1f10d9ede5d751a78b9b2020e5/64736039301.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/add48e6a01f7b6588a5832f458d68296/jerijonomelovoxilobuboxek.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/menubaliseworudilumav.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/75715795099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=happy+wedding+anniversary+brother+and+sister+in+law+quotesPDF 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_off0000fd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 11316 bytes
SHA-256: 7b4cd304b514af386dcc0cf8c8cf5a0b8159705327afa35292e33aa268cd572f
font_01_sfnt_off00011750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 17304 bytes
SHA-256: 417b08e6fceb5d1b484fa2c62214c1599516cfcf2a751d0aac30eeddcb6565b4
font_02_sfnt_off0001422f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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