Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1261fe2034b5a0…

MALICIOUS

PDF

85.9 KB Created: 2021-07-27 14:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 49d2acb021c927c0699589662b636343 SHA-1: 2b7c8befc7f4ae2ef39658870138699d05c7d5d3 SHA-256: 7c1261fe2034b5a0003c112ce5c19b1f46035c5ce227166d636b54beb35f1b8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://valaptop.com/ImagesVA/file/rowarefemadolod.pdf In PDF document text
    • http://yjsyrj.com/userfiles/file/20646380659.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/dakixosumibaz.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/v59l1rmm4agqo2133qgv674dgd/99087589429.pdfIn PDF document text
    • http://upbfassadenbau.com/upload/file/minazugizazifeke.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/14866092116.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c495f7d0c8a---5296203029.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/89981716482.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/94366112107.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/xetinuzamusevos.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/1c0194367930da72f149ec3f57c73eb4/naxobozotopugo.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/54688848824.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c876616f94263191ca6b5aa4410c6e8e/72084195363.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/e9983468b93eaca0338d89724cd76a9c/63157717748.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/2b3fa124a15b321da9cd2673d3007f77/gejanebeleziwujax.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/29495664609.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609272797496f---fogorido.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f2cd08a71d1---22645473662.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/7eeb0035302f9ff899a3b94cf4f78db7/37704838543.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/54737938879.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073678946961---64864247298.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/zagefopo.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/fanirerofonifusiromera.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/fuvekubuxodixetige.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/mn3giar5ns5rko1emhi2uf8u73/goxuxufajeragagoxab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=translation+reflection+rotation+worksheet+pdf+grade+5PDF 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_off0000ea79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA79 11172 bytes
SHA-256: eb57e6829d2177e871c772eb5a5189d4862fa798c31b0137ac22464fcb628079
font_01_sfnt_off00010473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 17036 bytes
SHA-256: 52ac7b36c5de9d6dcecbc6aa80a2eacdf50e6cd4f2ee9ebbcdceca2e42ffd73c
font_02_sfnt_off000130f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1