Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea353ebfe4ef04f5…

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 08:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 34f84ad92bd0ae47ccd68313e59142d5 SHA-1: 0af6f8a89e6602fb3eedcd09309e1a68fca757cf SHA-256: ea353ebfe4ef04f5b6af36737c193da6143ae8cbee4d1aeaa81bfccb36e99a5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm used to redirect users. The presence of external URIs and a link farm pattern points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://labuchedeberce.fr/userfiles/file/34357719970.pdf In PDF document text
    • http://lex.tj/img/file/nasibe.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/78430481471.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/bevenokeniwirosodawixo.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/norasizar.pdfIn PDF document text
    • https://draw.pt/home/drawpt/images-editor/file/40359192107.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/90513155818.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613545e289f1b---16874916821.pdfIn PDF document text
    • https://ntc-container.com/upload/files/garawijirixavujurifupiku.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/39965002486.pdfIn PDF document text
    • http://lamay.de/userfiles/file/jukubadawafi.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/40506492928.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210904162930.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/sipugerawewuforuxonudakon.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/ba21d778a5c21f2b363418a62222108d/90634748429.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/43456299357.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141127c91c25---79806783821.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/bikininilejagesavamib.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/ribonusegeme.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0bd0c77bb---93548636217.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/sixerewebojubazuxaxajinot.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/59443887842.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/xuvoxivugofimozalat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sinhala+physics+books+pdfPDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/zedowibovin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB051 16264 bytes
SHA-256: 1532251a631cb3bff8e867643072a916512de89ea65247b8aa615a525c08a5cc
font_01_sfnt_off0000da68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 10808 bytes
SHA-256: 6702be59cdce0787a92475b27191226da5cff36f0f177be759977e0cbed6e589
font_02_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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