Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff4a8bd70b8860e…

MALICIOUS

PDF

86.7 KB Created: 2021-07-07 13:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ca896a2b9b5ddd56a0cdd92c45994d2f SHA-1: c17ae1273576ec893a69268c4e993ad78f4a40fe SHA-256: aff4a8bd70b8860ede63e4b3aa1d424934f2d20612465b0b2daf2b80dedd46c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

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 http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45c3153337---26496535186.pdf In PDF document text
    • https://dovolena-jiznicechy.cz/uploads/13254046543.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9be3695ff---54604276502.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963980e4b9b---zinivenoxoz.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/fibafogexokajizor.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/9dcd05ec56c135bdcc415c2e48f26e63/96955904456.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/sejetisaruf.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4afb691b6---31141833892.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/padisugasimabolirubowe.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/53004020970.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/kegosusopuxufojorovibiw.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/78894890710.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/6149635064.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e9ec1f8f---57410672513.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/81f536dc63ff6334810dd2b4b8e808cf/25466489446.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/86094797215.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/990781c94f0dbad9b4a80640f2793497/jipifesegedelitulonilo.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/16655859780.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dcd4aa51c0b2248be3799098f814ce32/lujovujireri.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/xegibufe.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/nigef.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a7505ede678---61238405270.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52508bfa8d---norowefis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=capital+budgeting+in+excel+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_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 10780 bytes
SHA-256: 1daf8c9e1f8368c7735907fbf63c09f7a3029a74d530a27777b68dfce357e633
font_02_sfnt_off0001209b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209B 17256 bytes
SHA-256: e5a0a7355b04ae6ab3ec4f9a0f0b7d1f8263546ac2f1d856f14b56f58edaad8d

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