Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6c62f3c8237bd7…

MALICIOUS

PDF

80.9 KB Created: 2021-09-09 10:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8b828659fd1530effe983224fa7890ad SHA-1: 4d612bcca2365fede31206efe47c7b82ee7f33b2 SHA-256: 3e6c62f3c8237bd7df2742d8bd5bf99399a60bc9cb185ba1419de6fde6413840
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kurtoglumob.com/upload/file/91766455993.pdf In PDF document text
    • https://atvatextile.com/upload/ckfinder/files/xapajuxawexosabapazubuw.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393fc61471a---lowikeniv.pdfIn PDF document text
    • http://zgic.ru/!upload/files/xakowavifule.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3512932401813410c30e035ec4a723d0/fotababusol.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/durijalenetijupem.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/vasaroxilebotovekodel.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/47190404442.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/xokijofasevevodafafuwefa.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/wudusalitajofojoxemazamid.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/kiwamubipo.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/54709uu2m0gtm0nt40kuf3bqh6/28577090444.pdfIn PDF document text
    • https://slide-bearing.com/d/files/18383693698.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/97619879303.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/kuxepizunimiw.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6cf04754397e1325d4da2ec6bf8b1978/2467054041.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613131f000ca5---16138087546.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/83487875265.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/39958819898.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/sikunezigujivonaleze.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/virusawekupivo.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021090714483079624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=outlook+vs+bluemailPDF 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_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 10488 bytes
SHA-256: 1a56050438223f2d5a333a16fa94c8407633517d5d99a0318c904efdfc4fb2e7
font_01_sfnt_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 17616 bytes
SHA-256: 30394ba36f169b2f8b768167f1e752d405a1dae74ce63338a9b5110e9ae6c763
font_02_sfnt_off00011e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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