Malicious PDF — malware analysis report

Static analysis result for SHA-256 e210e933674db7d2…

MALICIOUS

PDF

80.7 KB Created: 2021-09-03 00:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c8fe94a5a555ee4062847b0442b1bcd1 SHA-1: d7b764919ebb182d37c0891f2a316b10faaf8ae4 SHA-256: e210e933674db7d2f25f840aae18bdfbb22906be42a788d39a2ff8a021c1ecba
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests that these links are hosted on disposable infrastructure, a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af31492d40f---52663844329.pdf In PDF document text
    • https://noithathoaphat11.com/upload/files/xiwewanefituvete.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/gafimakajilijazamasi.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/bd669123e6214216908c3409d51cf092/javifebatirikixu.pdfIn PDF document text
    • http://01host.ru/userfiles/files/fegefojavuvupa.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/63755620163.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/komekesosikafivuzevade.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/2c509754c9f60d542c87992c1e63dbe7/62178847755.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d7e729b42---18570715728.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/lobixamulapugedin.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/26612547497.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/85394363318.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b8nd45oufs82i2q80n8gn6f3bo/toseviko.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/s77cs09h58k9dni59tnv6puh4d/85471343258.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad46d51fdc8---21300086706.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160904708269d2---71726262282.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/39636830557.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/628uuajtlklg0vgpout78da1ie/tadisimixipa.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/beturileda.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609adbaf9fcb4---97929920428.pdfIn PDF document text
    • https://aneri12.cz/res/file/14509725148.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/gomanenuruje.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/jedisapul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=calculate+manual+flash+exposurePDF 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_off0000d6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 10888 bytes
SHA-256: 392cd0cd5e75dba31aff1b3849acded9f5fe01750a5d184fbb63b2994a82408c
font_02_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 17328 bytes
SHA-256: 321106d4692d42168930b8694f06db2edccc7b6554bd84d143e2a959f27a12da

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