Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4b193cc2562476…

MALICIOUS

PDF

86.9 KB Created: 2021-07-20 20:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fde842efd0de56d04af0f8a68b795abb SHA-1: 28b0b7abf7f361296ce62690b7ada60f1d1c0d65 SHA-256: 7e4b193cc25624763c8c59fce36e9f4770ea961e1fffb59baaf805c6488b6290
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially compromised infrastructure supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://artdealer.vn/upload/fckimagesfile/ae86e9fb876b112740612d8b40bcdf18.pdf In PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/fb24c07c9e4124088cf1df255b944b8a/nafiziveluvoremobadugalu.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/wodikomabuzizejopuk.pdfIn PDF document text
    • https://questyme.com/userfiles/file/xilekotuwuf.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/6445517448.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3ab36a8ec.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/770ce4f1796d6618c99ed4ab4781145d/pumesolezawe.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b10bd6852---3282297760.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/wubigarage.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094aab3cf298---foxuvun.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92cae6eda---faxopebifi.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/xevexeravojexeripifozesil.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/6201336276.pdfIn PDF document text
    • https://hiroyoung.com/data/files/lamuwatasudo.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/di6k5inn30j6jpdtr6n9dqq6m2/rixefubosivikon.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ade0a830d---xidelekuxegeretodineviti.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffa895beb9---lukadufobotalujuk.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/fb186998088aed9aac3afda2e2137666/sunedatoberososego.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/70165857147.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/fawapurekigomituzajomav.pdfIn PDF document text
    • https://avflash.nl/upload/files/jepikozoran.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a06c7eac2---64216763528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+father+vodPDF 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

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_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 10072 bytes
SHA-256: d9acf1bc8a002bdc663e491363ef7640299066a8afe217ee25aeb0d53ccd23f4
font_01_sfnt_off000104b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 19100 bytes
SHA-256: d9ac9063c5f7fa417b0ecf3a4e8fcf7a5f77adb4263900c81f06c40bd0ad920f
font_02_sfnt_off00013549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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