Malicious PDF — malware analysis report

Static analysis result for SHA-256 68301069e0b0296f…

MALICIOUS

PDF

101.2 KB Created: 2021-08-16 07:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3602cdba51dda88a8fd608cc37736fa8 SHA-1: 5ca2d2eba7974236066f93a9eaaf6e738c46f1aa SHA-256: 68301069e0b0296faac61feaa28cafe4124aabab7fb6e8ae04a5bae0237396a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains, likely to distribute further malicious content. The presence of embedded URLs and the overall structure suggest an attempt to trick users into downloading additional malicious files, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/7664e97ce239447b634fee51801b998b/57158669185.pdf In PDF document text
    • https://chasehr.in/userfiles/file/kegomululuvonume.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec962018c---toxaxuluwagoniluzituvag.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/lofidowidifutofi.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-8-7/20210807015624669153.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c77c64ef32---didizuwotusebeg.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/31142772c98862448a5ddf582eb1666b/45873706018.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/9821956831.pdfIn PDF document text
    • http://scriptonica.ru/files/files/nilevojig.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16086585e76af4---45045083317.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/14191711802.pdfIn PDF document text
    • https://mmszke.hu/files/file/dagabidevarutufuxo.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16094cd9d7dd45---wofoworexemixuful.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/93625606466.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/5e2684b3be9eb532ffce5fd3006f2434/ninifavimudu.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/39001451020.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/87068523660.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f47c0b665---ritubop.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f3fdfe46210---waxem.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1da7e6eeea---85459832575.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/n7uen087u9cjd5k27s317p9180/sufomus.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/412e89b3bdc7c1807a8a174519fda76c/dejirubuzegeboloba.pdfIn PDF document text
    • https://gangnampools.com/contents//files/83809938759.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/e6gm6uk764n5u3bf68t39hmsd2/60847067013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=cheats+pokemon+moon+emerald+gba+rare+candyPDF 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_off000123b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 11248 bytes
SHA-256: 444728624aa64aa1edc154ae22efb51f5fc7c517a3bcd637d0f0c1253ab2ef41
font_01_sfnt_off00013d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001559d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1559D 18732 bytes
SHA-256: 0a84f4a1c1412c118a24776c43ca33a57d8447c7d6a65de5769284b0265f3991

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