Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed67674f19a3b8d…

MALICIOUS

PDF

130.8 KB Created: 2021-07-02 00:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ac760ce70fe6205a65065bb97d13888c SHA-1: eee5db9b35bb3d57b33829a240aa731b984266d5 SHA-256: 8ed67674f19a3b8d574e279acfebe1e209bb7b2d70b9a8d50fdd2e96a249c652
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting it's designed to redirect users to malicious sites. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64c9434ecf---sutunupiguginaw.pdf In PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/g8qn3rvgpbm45390tso75jjt0s/28905167578.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35f2b6d64c---12432947336.pdfIn PDF document text
    • https://vieclambanhang247.com/upload/files/mulutekowidul.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/maweboribezi.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/fipetubiwo.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ask0o78cl08qvrvkk69htinie9/97477189508.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/8ieop4pf3pc1krrhiemu9sbj93/43122269161.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/medejatawimidimubevebe.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cabda3816b0---mubug.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c967a6dd59---50626586366.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/modijukipaguladok.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/eel7earp5ldomrjqums33tleq9/25710161051.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099c2e1114d5---8684390529.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/030105159804.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160903b21496bb---79417624764.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/871690f047713380c6b0491715569c7c/68065054327.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091c80eec00b---golenibo.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021517935183454.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac34fbb3a4d---43630339806.pdfIn PDF document text
    • http://htwy.com/upload/file/68693680703.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/52748592713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=physical+exercise+books+pdfPDF 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_off00019d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B586 18104 bytes
SHA-256: 8a39864f44cdd67f2229725a765b5893747d327f87795010d441ac99e48af366
font_02_sfnt_off0001e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E47A 10964 bytes
SHA-256: efd14fa1be79210c5f908b93d399824a3a04631fa79b6f53b396c6eff6d7a967

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