Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df38a1ede299b4f…

MALICIOUS

PDF

139.5 KB Created: 2021-07-07 08:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a21b5eeff442d726c0e064de998552d2 SHA-1: 2cba395d308d291bc8980ef2c66f1c7250922903 SHA-256: 7df38a1ede299b4f9b8ad80d924c96551b6d3b8f7053625b0992941dd4c11dae
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://chcial.ru/uplcv?utm_term=game+boy+color+full+rom+set PDF link annotation
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/5nptlvdf3l4b4asaeqv57fgs3j/63632116223.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xalukinufazugari.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/55671106682.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608118982faa3---potodudurimumadatule.pdfIn PDF document text
    • http://azizolace.cz/images/file/56282930707.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b195dbb03cb---19990970679.pdfIn PDF document text
    • http://babamoleskine.com/files/file/74387543013.pdfIn PDF document text
    • http://gibisch.info/files/files/91312650973.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ltol7rlcrj5i2438hhm9u8nsin/55929723170.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/lopuxozabapebotu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae67b292be---kanowoxawo.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/88007158309.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4000bf1e2a---72847801956.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/rafevaxadiranuguporela.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/filukituwanumadefinipi.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160e1a991545d4---97606871328.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/18000814968.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/satakirozupunejonasibu.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/6389679955.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ad4a67e5---54709367011.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/bba89072d8c9532992985e1a4a1190ae/56211377066.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baaeff9570a---30041619786.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160e533a3d1bfd---pidabowa.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/xanunusodujotapamod.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/23549475164.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/5ef556b347610b7befc495c907d38b25/temumugegitadekuvajajifo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2A8 17144 bytes
SHA-256: 4c241b8956f17c1307ecda710186084767991fe936b43a6724e8c06be8d77297
font_01_sfnt_off0001ef5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF5B 10696 bytes
SHA-256: 31bbf092a30a66e6cd429472e40fddd5cfef0117abd53790a73355ceca80131d
font_02_sfnt_off0002080d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2080D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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