Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e25b113b070c6f1…

MALICIOUS

PDF

84.4 KB Created: 2021-09-11 23:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0750ae7fe68c4a29970fa8c232839807 SHA-1: 970114ff07c0d000dbf21fa4e96dec3941e71d82 SHA-256: 8e25b113b070c6f1dc1a1218a006f191b12d755fd25d2910dd432524ebd6a4ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains embedded JavaScript and functions as a link farm, directing users to multiple potentially compromised WordPress sites. The presence of JavaScript suggests an attempt to execute malicious code or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab3e73da6f---pawedubite.pdf In PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/popibege.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/gumimeduxilanipedidix.pdfIn PDF document text
    • https://rajakedua.com/contents/files/55733877828.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/1069085145.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130054f17791---gewagixawod.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/87859874055.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161384ef6f0e91---donesewevumijuxerik.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/51074559136.pdfIn PDF document text
    • https://baglab.pl/galeria/file/fagosuterobagukepunaxemo.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/pulesafawaxedojugifasej.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/11806337732.pdfIn PDF document text
    • http://video-cycling.de/files/file/17623016599.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/57899438693.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613af6c990593---46695204637.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/82614156161.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210911_215630.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bolajijomupukapel.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4ff2637c4---magirirowukujopadali.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/mesogax.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/41650696679.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/bafivoxel.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613558aa03a5e---bibixexavilawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=snapchat+duplicate+apkPDF 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_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 18176 bytes
SHA-256: e71c17a1f01f0ad11b8b718501acc4f3c6c34e5a2d9230293fa92e2cbe647062
font_02_sfnt_off00012ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA3 10488 bytes
SHA-256: a4f48ff28e1e1a165d77cf141eb93f264d4ec57e1affea702cb80320e474150a