Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2949db414526b4…

MALICIOUS

PDF

77.9 KB Created: 2021-09-01 21:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 06d29328e0989bc4e8b41a1facb1025e SHA-1: cd6e2b2efdfb5317985843d3b875524190e22d5c SHA-256: 6e2949db414526b4f7c5097f027a507550358024dc6795384bb66f16e44b00bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on compromised or disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 https://smidgel.ru/uplcv?utm_term=molar+mass+of+phthalic+anhydride PDF link annotation
    • http://bigband-ulm.de/userfiles/files/xazodafed.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/66202706425.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160902cd30eeb6---31109882155.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/fawirafujikixizok.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a123f5980bc---susisu.pdfIn PDF document text
    • http://www.grifin.sk/files/69978096344.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cee1209ec27---dijinunabu.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/tebadadinavasakabotufofu.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/lowasijuroxekewawufoj.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/81336733858.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/tavowagiral.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f9562b081---mupeminaxakitekugugip.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/gekorusiganuvutosaxuvev.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/bozulebutukifirugepikir.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/1de34268d127326092b14a70900c96cc/75216049208.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/26179140336.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/36940188893.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161262a2452207---belepef.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608dafbb66761---degimixepidiw.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/59623003308.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/sawafuxamag.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609689316ff3f---86714533049.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/df851ccc33bf68a20e48724b57c201db/gezosovirapomusuw.pdfIn PDF document text
    • 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_off0000ca23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA23 10992 bytes
SHA-256: 6f156af04be80af9528645225a905f7368c248be568b22469b61b788aaef2e44
font_01_sfnt_off0000e386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE386 17168 bytes
SHA-256: f89c71d59e0e21d527e2a850f9d4234f0d942345ee89c68dbad350cf433d85a1
font_02_sfnt_off0001107c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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