Malicious PDF — malware analysis report

Static analysis result for SHA-256 149d368be8ac7ab7…

MALICIOUS

PDF

96.3 KB Created: 2021-09-01 07:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 87b1f5916a03b13f56673f24fad96bed SHA-1: 52006f06fe1c8db5f4cb4467a80e1f4aaaf23a09 SHA-256: 149d368be8ac7ab7cbd8fbe07993abafd798f4e25c8717bcf174ea4aee5ccbce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and a link farm indicates a phishing or malware distribution attempt.

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 http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nodubetibivo.pdf In PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/siroxumomavatejet.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/delepobetudi.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3e2286b2d---29134500168.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/54303717452.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f76d97f1b---noporuzagesenaje.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/72426197349.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/nulekenoxi.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/siburobaduvokexufomi.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/sivukorowono.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ced36ca05---mapavibas.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800ab068523---rezipaworixavefawu.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/2f549873b3393d5161e0a3cd06537b46/dovotopadilil.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8a861216a83a230888aee7df456a18a7/65640887184.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/4da9ac4c29a8233dd487156a8a53bcbf/dalogorasunepat.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d590f14dce---netidugojikedukif.pdfIn PDF document text
    • https://vestol.bg/files/file/64530782741.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607f515b52c16---sitoxekobojilegolamuxa.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3e3c10a35---4096635649.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///geforigovumate.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/679a0f43a639592312ce2584b474ce55/6449218078.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160e5a4276de68---93390562408.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/33108522316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=copyright+act+bare+actPDF 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_off00011536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11536 18232 bytes
SHA-256: 007ae5e15d9fd6d6c8c37beb5eccbe8ca801ca0a9ac2f6101e670655f9f64d56
font_01_sfnt_off000143da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF1 10620 bytes
SHA-256: d079528e8a189844acfbe45b53ab269d1d09c8b5f5ffc55bf01ee52ffa0916d9

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