Malicious PDF — malware analysis report

Static analysis result for SHA-256 000de17b942851e0…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 10:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ecbdb93d45dd8852940ab2cdb4a64c80 SHA-1: d2825c26d28756160448ab9fee8830a32c6b6654 SHA-256: 000de17b942851e0dd2d8a2dd30b9cc1be912f6168eeae6559c3aa18930c7e64
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Numerous heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, with URLs containing 'utm_term' parameters suggesting phishing lures. The document body is unreadable binary data, typical of obfuscated or exploit-laden PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=how+to+remove+dog+filter+from+photo PDF link annotation
    • http://ozcetinler.com/userfiles/file/pafuzuzomoxovugabidub.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/ec0eb77da7188124efe2ffce71a9a77e/suvekukokidejifene.pdfIn PDF document text
    • http://kco.su/userfiles/file/gikorogosigumile.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/29903045108.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/68019492663.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/45232205812.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e42129492b---rejirogaz.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/36247519299.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/zosagukejimojukavozewised.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efbd59468a---74339977369.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/37176307676.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16142a92e61e8b---85147841559.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/daboxoguluteruxagaputok.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/92812830733.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/zivikigosopazonamazog.pdfIn PDF document text
    • http://vaynhe.com/upload/files/lofadizuki.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/60064189184.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/javetupigobibaburizig.pdfIn PDF document text
    • https://posh.hr/files/39550830603.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24674413698.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/kakiwabaxejajem.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/sufupagasi.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/fotadarifozu.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_off0000b37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37B 10652 bytes
SHA-256: a68faa4487cf26f6a6087a5ed4695aa4d9669e3ae6abaed725155e0c78e9915a
font_01_sfnt_off0000cba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 16532 bytes
SHA-256: 9afceccff77eb1b234b8cdff0811e019ab51077bc0551d9071c6bb07ba9a437d

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