Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee810dc0199a9ea1…

MALICIOUS

PDF

96.8 KB Created: 2021-07-04 22:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 2a246665ec5c28b0c659b631da93751c SHA-1: 9d3c7e24cc415ac082689ba16b00f1ecaef255ca SHA-256: ee810dc0199a9ea1fef53a24bbc41256ad35b513af2ea7277a579bf3c32fac7e
164 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised websites, suggesting an attempt to trick users into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://katachizu.com/img/news/files/buzivoxe.pdf In PDF document text
    • https://oklogistic.lv/upload/file/86876621432.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdce0b02db7---66258369460.pdfIn PDF document text
    • http://skyfestival.kr/ckfinder/userfiles/files/83742476447.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/7632179592.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/64310148066.pdfIn PDF document text
    • https://ecoretras.com/file/87756773920.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/jojedonavivobazed.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/42eadcf95df09cc3267f84d5b4626a2c/70347044008.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/b38955fc4d13f366cd025b51d592b2cd/lelelaj.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770036a0174---53199976456.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703f38be47e---55884944065.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/84242762040.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4bcb49dac---zekili.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b4eec2a95---43482223717.pdfIn PDF document text
    • http://gibson100.com/clients/870224/File/35754031248.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077579acacf0---defuguwe.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021063011002173499.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b740bd3e8e6---fubafe.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/72279892712.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb040466eac---79709610631.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/zafosanarenolebaxabut.pdfIn PDF document text
    • http://vinmexindia.com/uploads/76968035018.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0499a2333---judisesagobadobotajik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=paper+towns+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_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E35 17760 bytes
SHA-256: 68747e3b5bb951edc1d1f6d3f332dd0a2f98cec77d33ef6e6669dcfb37006e05
font_02_sfnt_off00015cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CFF 10380 bytes
SHA-256: 566aab4bebfcba46b7486cdfe6bfc29cb736db5983ce94c58a2bccf1b52a8a36