Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2dd4681eee6789…

MALICIOUS

PDF

87.9 KB Created: 2021-07-01 09:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1bf788b7dbb80544eafe7d56f6611da7 SHA-1: 3b70d7d312c12b7fc0a3e9deb56fe76aee3d8260 SHA-256: 0e2dd4681eee67890f426afacbd4da7417d55c1829d980aad754227615859cc3
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://promador.pl/userfiles/file/79758241316.pdf In PDF document text
    • https://aronabritcan.com/userfiles/file/86969717311.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/8395232698.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/4efdf3bd2d65737e49fc2408a799609d/30135812054.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/nvtmcs944qhr9bafpnk54bb82j/degemogojesenumak.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ce591bc81716ce18116452955c9e6434/86440825736.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/xelamigokamasano.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/niligemokowekiwoleje.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/2a3ceffca8088137e656e637da4a18cc/58993264340.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8f086ece---59203486959.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/05b417a2b39abd0bbb0415807ef4fc54/12434377420.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/0811969035c5a9e5cfa5f7aeb645274d/kurixutewesotifosu.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078415e80606---tuxes.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/e4iumust7dpte2k571661d49lm/zoxijaxuxuwatedawiwozu.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b8132b6ac---90923781888.pdfIn PDF document text
    • http://uci.ir/userfiles/file/kagibulokaraguvamusaka.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/dimatebu.pdfIn PDF document text
    • https://motacademy.it/file/negufutuxasas.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c568a6f29.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/13765042687.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/88871169342.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608f3e1177303---62872332367.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/putiniwuvipad.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b053e00f5---4499452111.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fda95bb01---xutufupimiluvazuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=social+security+number+not+required+policy+manualPDF 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_off0000f454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF454 11252 bytes
SHA-256: 0cacab0f6a1cd01d44c98e245a13d5f104c76e42fa1c622028578ca462f4670a
font_01_sfnt_off00010e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12657 16796 bytes
SHA-256: b07e2b34d4ade228fd4de244db5128c01af165b6c22cc74debf237a1985c0621