Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01a2dcfc6f63978…

MALICIOUS

PDF

83.0 KB Created: 2021-06-26 05:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 434c23eb566468777cfa657f7d628d79 SHA-1: b1b576f3780f541363d26237b94f5605cbee4244 SHA-256: a01a2dcfc6f63978bd863f76cd4e293a7a858433c7168f25738ff3318024dce9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and heuristics suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a2697e6526413bcc0d70a758bdb35a20/dupatinuna.pdf In PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/da71172785ac50c5db66c1949fed5651/sugeviduxanuvasaw.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc222c86b71---xomagalotugu.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/dudaburajamisa.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/zupadixelemaxaf.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078a3fc6f001---35448111417.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/xavigame.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/jadibivipi.pdfIn PDF document text
    • http://apple888.vn/luutru/files/68480148028.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93839ad26---kegejulujonexelaf.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/98526423615.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/89127356321.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/uscuja5lrq7unjd20if23q5eja/parasokigewebegu.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/11358872472.pdfIn PDF document text
    • http://dzbnf.com/upload/file///tabomekikanekudeg.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79f4da99b---70920548815.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/a88d7q3l2okbb8deia5ejvqejo/85873767862.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed32df1e67---bazujupuvijukiwowivan.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/20700140702.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed86f5786be75dbbf02c06b0fddb806b/95218577225.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d7ffba26d---66937054553.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/kozuju.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e55958795f---pemoniferegekapokusot.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/74788142502.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/jalapetedekenovemelazet.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6c17baf97643175f7be3e5a9e2dfacfa/15030092540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=chocolate+chip+cookie+barsPDF 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_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 17028 bytes
SHA-256: c69d737fd21d82204424c1cf579119d0eee2682793d2fc2ac13c954e582723e7
font_01_sfnt_off00010e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E17 10632 bytes
SHA-256: f526d1b98a384f112642617e058dbbb182236b512085d0920d450c482d205a42
font_02_sfnt_off00012661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12661 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1