Malicious PDF — malware analysis report

Static analysis result for SHA-256 230ec0d9665aa7d9…

MALICIOUS

PDF

89.5 KB Created: 2021-08-06 13:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d6a2066f7f48368ec83f648f4fcacd2d SHA-1: eed4f0abf39b82b64acc2dc4ff946ad03d3b67a9 SHA-256: 230ec0d9665aa7d97c51271c70d7e70158398e1b150d4afb07e609dff73cb142
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f6eecbd50---83866338579.pdf In PDF document text
    • https://eyetracking.pl/userfiles/file/47063583423.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdde2fa48a5---zadavabudalegolam.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b63de0696d5---61566461302.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/kazaz.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/mekirijaresat.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/gomomabod.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607281b017592---97626518748.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/delesepemenaxupulisojolo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9db23e11cb---83128958928.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609898d65a6df---vuragetusubinukujulabofi.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/7fb7a712c5bc2a034e2b3f7ed2f3e8ce/repifigeze.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/447j6hpmdg8n5c9rhriqmkeco0/zodipitekujijowakukobivi.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d87e91fb3---wovefexitobufasiw.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/nujapisonavav.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/53171918554.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///buvedovav.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/jrug1l1hipbjj5iat31nv4kort/lidomegolaje.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/u1dqkkmu6aqhi8ic2hpdgr8f0l/deguzebejigo.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b559310bb8c---4509698139.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/bometeripanalaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=aditya+hrudayam+tamil+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_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 10876 bytes
SHA-256: b186292bf30690810589ef03cc892924ba5af72f47941c288c251fc142bd4538
font_01_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 23872 bytes
SHA-256: bd5f44ed24207a791d24cede360e29268c4b8577351178528a56600d2c322cbe
font_02_sfnt_off00013fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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