Malicious PDF — malware analysis report

Static analysis result for SHA-256 6014e249c9b16937…

MALICIOUS

PDF

74.7 KB Created: 2021-09-18 16:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1b6a3c035f68650f1b5c78e1ab5b32ed SHA-1: e1178470625a582e0931736db74d6d5c26541d5b SHA-256: 6014e249c9b16937269e5e6bbbc2f419a3c408d573604a730e97e9f87ff52d7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using small PDFs as link farms on disposable hosting, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of external URIs and compromised CMS upload links further supports a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://catamma.ru/uplcv?utm_term=romantic+shayari+sexy PDF link annotation
    • https://habibitours.com/ckfinder/userfiles/files/56292916868.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/djd1j6342kao05sf6ts4rora0c/25965302327.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/94569366270.pdfIn PDF document text
    • http://tochalco.com/uploads/files/tifukovowufazovuro.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/55348742868.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/13045736985.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/20068572021.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/95833889066.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/8492120770.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/16757813393.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/xipinedamovubasanokowojo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613187c776ff7---ninedufopobaviv.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/87473206827.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/tulepumawuzulakajali.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/29515672508.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/28308548274.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/2811303637.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/61941879308.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/rovapubijapakezip.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137cf4c7bf99---10083544464.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/19981660371.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/937620072.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16141a0f4e4446---7725568452.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2E 10712 bytes
SHA-256: 8a9ca24e6a4206832608be220cc2cd7cd96fc169677714ce0d33c9b8ec477f94
font_01_sfnt_off0000c6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 16192 bytes
SHA-256: 126aabc53b187bc4421529373f04e2f66a11804dfeaeb35cb650b132d56c1dbd
font_03_sfnt_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 15444 bytes
SHA-256: a49de83b21716ff5586e6d3a56a823ac9fc4b447943616ae98bec63cb467f6cf

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