Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a4153972a1c9c5…

MALICIOUS

PDF

71.2 KB Created: 2021-09-09 20:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ebec818a457a178f51b0bf9fa8d04fdf SHA-1: dd3fcfb1507c8f5d1eee68b5a9296cbdba09496f SHA-256: 20a4153972a1c9c569a0d7c97026bdb07e70341a5a241a5b4ff11926f94ee8c6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=schrodinger+equation+for+multi+electron+atom PDF link annotation
    • https://anpheatingandac.com/nbloom/fckuploads/file/38424153817.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/jokote.pdfIn PDF document text
    • https://ijp2.com/contents/files/gomed.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/lekoratimuwubatulibuduxe.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/rovagebovizanev.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/sevazagitaxebesipudidale.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/41614076919.pdfIn PDF document text
    • http://marymo.ru/uploads/files/28446366872.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/tezotek.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/67828630786.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/11364746949.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/wopop.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130dfe4af712---lekokapek.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/82215985532.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132db8ab3fa9---belelu.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/vojaxuvukizobita.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/c5bm690i7m959q17db5rd44vf6/99086235757.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/49139529896.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/budazokozikukekozi.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/reviziweparikaxo.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/20235454070.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/redisarokapiligisuledimax.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/59270518110.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/34212833784.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_off0000b64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64F 11076 bytes
SHA-256: e0898ed6141a68b2b8effd31f98d2c909f7e0144530e7c4fb8d3910c122abb32
font_01_sfnt_off0000cf6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6E 15700 bytes
SHA-256: 1624a426e54139ed6222e9c89f272e772deddc3ec240f895b21c705bad4449de
font_02_sfnt_off0000f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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