Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9458a6191fe13c…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 10:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 19c7f059c2ae9ed6776e9e81be5660dd SHA-1: 2340cdd73dcb64a9fa590c748b4d4c3f0c54eb57 SHA-256: 2e9458a6191fe13cf3c23fa7f38b968a62b81b9d56d0d1e59ada94ede9850769
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites used for hosting PDF payloads. The presence of 'utm_term' parameters suggests a phishing or SEO-based lure to drive traffic to these malicious documents. No scripts were extracted, but the overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://medvor.ru/uplcv?utm_term=doxycycline+and+lactic+acid PDF link annotation
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/51ddc23d248a778a2f2198c4419216b5/41375651452.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/94729533501.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608016128b7cc---vokoteno.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/69301884128.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/a7a9fe03c8f4ee3c79f67d4928f0a24c/gojuzefasokobekidewegome.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/nudalofinor.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/nuligibejepojat.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/sejobidijofomimowuga.pdfIn PDF document text
    • http://solac.nl/app/webroot/files/userfiles/files/xowivojejobeloxez.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/a419a0a1fd55bce53ee24797c3e1f620/kewesusirizawokawun.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609247deddc84---sidekilavelevena.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b29341a633a---15559514839.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9086f1c60a---diwakufudifuvotuvidu.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be7ffefedb---valoveza.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/9751847870.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/28324186581.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/43146054851.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609846b8a5166---xofiraxudivovi.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/l3mi6664ssrum8pg1k1bj54803/3398878744.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/rokivovuletas.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/c325db385a3efe617c4641bdaf645a62/razifijikanezowaga.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40a66d612---wiwajebijazi.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/9tn62ugmcpu6t0s9r6sf38m6qr/51985032819.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0787806ce---27976734586.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92e1e7360---95398368252.pdfIn PDF document text
    • http://splogservice.ru/content/file/70022081579.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_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 10312 bytes
SHA-256: 31a6245645884e7e75b85dcaa76ba48c47181486539000b6ada2d49f4a5a1d40
font_01_sfnt_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 16516 bytes
SHA-256: 5493220cae9ee6e614c9f4caf007598654fa4b5caa700ce4c3ee5c8d972adb5f
font_02_sfnt_off0001291b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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