Malicious PDF — malware analysis report

Static analysis result for SHA-256 9041434278e1d261…

MALICIOUS

PDF

75.6 KB Created: 2021-09-27 17:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0df3d393009690f5384fe2bcfc49265a SHA-1: ae8f690443278bd99955c52604f44d584756ddad SHA-256: 9041434278e1d2618a29af5e9934b69fc3e2c845e2b19b50e09f24e90af7c22b
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. One URL specifically points to a file within a compromised WordPress upload directory, suggesting a distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://accesoriosalmayor.com/images/userfiles/file/jukofa.pdf In PDF document text
    • https://veaodaibrahma.com/uploads/image/files/71541588981.pdfIn PDF document text
    • https://megashina24.ru/files/files/22918750423.pdfIn PDF document text
    • https://nppgursaraijhansi.in/ckfinder/userfiles/files/92502178036.pdfIn PDF document text
    • https://umartravel.com/files/jesizafoledomojabi.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/kegabefurubiz.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mei9uuvfqds13r1315treo0ji5/kevivevomebogebexowam.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/3c8f27b6d6e1bb38a31c030f6df47407/xoboxemutarejuzevedanula.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/16740410761.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613405542d184---78441781625.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/acb70683a682607a926218ee5fda1ec4/wipos.pdfIn PDF document text
    • https://clubon.top/uploads/files/10525720431.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/lisokokumezamopejawi.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/96659569523.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/6872894390.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146447996a03---wekodumi.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/burelazenanowatogi.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/8091889839.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/bagipixumiketivasot.pdfIn PDF document text
    • https://membermimpi.com/contents/files/dujes.pdfIn PDF document text
    • http://dasbluemchen.com/26163181061.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/jodibodarofoj.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/gowir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ek+paheli+leela+full+movie+downloadPDF 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_off0000c076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC076 18372 bytes
SHA-256: bb332ae6c74c14e483c467a6a9e2d5725d19ce0fea8002b13ec7d482f7c8fd50
font_01_sfnt_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10844 10724 bytes
SHA-256: be6389d08c3cf94bd86dc5bd17e00958ff4c12711911dfedf25e894ec7151bcb