Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9e502d7dd66231…

MALICIOUS

PDF

72.3 KB Created: 2021-09-05 18:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 80b00a27027a9e9849dfbedbaf04f88c SHA-1: 5faa6baac1d2eb71ce45e83d57d4b719d32c7ea6 SHA-256: 6c9e502d7dd6623161314bef6aa74e64452b1762cbe4500f3e522a06ce68c3cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a PDF-based downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://media-production.net/admin/ckfinder/userfiles/files/86888407928.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pc1e72s0eh0n7ke7iuumebtem0/bobawev.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/77602560784.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9855b7caf7---58377157039.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/56168599620.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/661232ffd9dde0e8b2664e228c033a7c/xuzokadizib.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/korakazo.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/78028786505.pdfIn PDF document text
    • https://network-italia.it/file/gogov.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/kefosamanogoleje.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/34227526276.pdfIn PDF document text
    • http://gr-chem.com/upload/files/tusazojozirigin.pdfIn PDF document text
    • http://fittbike.hu/files/file/gowir.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920fd770358---84061315082.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/fulapunolakawurukaraku.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/59b3010ea9b0bef014e5ad936eb4842d/bowemiterakonogexez.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/72384262323.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4273d24cde18dc8e3df77e124262e71b/vogalune.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8cd5a8d34---57711544169.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/2d4ad935a79da9d296d58e0210fc5d81/vigufibodimedizuweketi.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a623f56bcc9---xuvajefelumenoke.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/cfo723fhk90mn3tp6so4p3r864/xinifedemonemor.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/doxezoxakanufoganelemip.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/65026664169.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0glc4184qujed7inujvoupmqfr/vuken.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/ditezeberokilufom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=foundations+of+oscillator+circuit+design+pdf+free+downloadPDF 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_off0000bad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD1 15284 bytes
SHA-256: 92a6544ceb7a22e47f3cf268fe107109b48cf0ebee9c371bee18662a5633cf7f
font_01_sfnt_off0000e14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 10956 bytes
SHA-256: 702a34f695f03aef78b451d79f051fa8cde36683d1d8b6bb899daa28b4d291cd

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