Malicious PDF — malware analysis report

Static analysis result for SHA-256 34932bdb36d842fb…

MALICIOUS

PDF

89.5 KB Created: 2021-06-29 19:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69d61edb4dabaf5b48448716772a1784 SHA-1: 1c530fed1a4ca6fda031750cb01cfd1f2a8d668d SHA-256: 34932bdb36d842fbf1145ed2322eb5ad26358c716ab2962f88a61797e034bb23
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious link farm used to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/f1d1633e3a2d525e5ea07725bb7d9c95/katamimobupuzizik.pdf
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/debujiwawagomib.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091b8eaccf29---27474247884.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/65166324129.pdf
    • http://veraschwemmle.de/fckdata/file/nerelututavajux.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706ff48ecf0---72867603468.pdf
    • http://www.puhito.hu/uploads/bugakamawobefixame.pdf
    • https://sy-tech.eu/file/77037516460.pdf
    • https://doctornhospital.com/banglanews24/editorsfiles/files/67680782924.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/zafex.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/6418048dba28fb28b0543c6b22beaf8b/kelevip.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/4ddd253spmu1s8nilj3i5hbf9o/51010224999.pdf
    • http://daedukgs.com/admin/fckeditor/data/file/20210605042340.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/9284bd8bec7b47b3c466cb6e26c3ef6a/66522367760.pdf
    • https://basisnomor.com/contents//files/sizazudegu.pdf
    • http://oprfhs70.com/clients/879438/File/20611750825.pdf
    • http://medi-sen.com/files/files/8827627151.pdf
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50951622896.pdf
    • http://kstarsmall.net/userfiles/file///8204863380.pdf
    • http://mtecommerce.it/public/news/file/51829530224.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/d01fa3bda014f3dfc26ef37029871fbd/14282824399.pdf
    • http://ahcxdq.com/uploads/file/282233458450.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/sh3m1os4ppha0rofkv2p8gchec/ledavekiv.pdf
    • http://maihome.hu/admin1/file/89813318418.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=prayer+to+release+souls+in+purgatory
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA9 16792 bytes
font_01_sfnt_off000112c0.bin
9f1b0abef4985ce1295700ba8e3c05919340a2ce70f818603e4d6a98fe53db52
pdf-font-stream PDF embedded font (sfnt) at offset 0x112C0 10644 bytes
font_02_sfnt_off00012b44.bin
86252cdf2ea27a84f341119d7e2b30a75851f2947058bc69a3d135aba02ab382
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B44 17512 bytes