Malicious PDF — malware analysis report

Static analysis result for SHA-256 a641457e1c3e881e…

MALICIOUS

PDF

86.2 KB Created: 2021-07-15 23:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3679006001ae5928f551f21c8203f94b SHA-1: 442844958c224feed9a0259bc4b9a474f68d7647 SHA-256: a641457e1c3e881efde5684888e8a59e28c1bf4486306e844e60dd39029a2124
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/28917c5c6d84c5330cae396bc5630374/96594565346.pdf In PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609998923a7e9---50836259265.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607761b8c2499---dipufutivozir.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805398defdc---41972780878.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac54cbab257---wasojewaditusulivuzakeriw.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/93766003143.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/58452797825.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/xanunikexo.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/vofakasobanorurivivoxera.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/kukapiwef.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/7ed0ef484c5c409186e43e60bfc66f9e/82549089925.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac726701f2---pejoweguvarameralunize.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215132252579072.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff31210a9e---32624017482.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b5758903995---tusudukobetubetuz.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/gm65h5bh869ee8h0t7doen9ig3/gawizegodiwu.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/89817161206.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/70921140581.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/wokelapokovupemavedog.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/rv4d3ge82vsi9ioi1f4hoinpet/wobuzomiboponizemivuko.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/jojutudixipuluz.pdfIn PDF document text
    • http://halaljones.com/uploads/files/17038499426.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/53443071874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+resume+templates+docxPDF 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_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 17000 bytes
SHA-256: 91d9ee07b4db763ccee696803fd279c2e278a29e21137776624791c6dcfc5aa6
font_01_sfnt_off00011895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AC 10872 bytes
SHA-256: 6d4926490841e1a874b7c2ed12b0f2b0e3953bb68d5f6e72274edc2424f630a0

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