Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cee4199bd7fb4c…

MALICIOUS

PDF

145.6 KB Created: 2021-07-14 02:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8ebdd66018311385e1ca0ec7ebe984f7 SHA-1: 99627533d082c3264e205fc778ab5a92378d70e2 SHA-256: c2cee4199bd7fb4cbe014cc4a30f53f8d509488d8408cdf7cdf174eb2858d327
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to host phishing content or distribute further malware. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cmoretv.com/userfiles/41791734774.pdf In PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/70949759095.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0fad7d39c---xogedava.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/67072633807.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/064901a407cd3de4c5ad18a679134760/71551879860.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/e3oacgusg9kaa22celtj5gs3ns/nedexe.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8bab2a731---99644043463.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/57435229806.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/24bfae7d1413561f7e09f6a4b8442cb8/5441050522.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210714_BF2EF0CDB19BC079.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder//userfiles/files/bewofogagexazedipasuriwik.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078732aeed2e---50347304510.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e941578298b9e2c459729cc281f09d86/xapokowado.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/67563401760.pdfIn PDF document text
    • http://empezo.xyz/js/ckfinder/userfiles/files/52162853075.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/534b0a7e964fc1edcf00283fbcf8eb42/8885523957.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/5682233281.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bd18b6f18bf---jesukadebajutezusojam.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eac5e5ce6---zixubuzidavadawubewa.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/dfa2260238bd920cd5d544a774333958/41311660277.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f933b2c947be11b49b7709ff13f141be/79431275643.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbcfce1948---4245316558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bible+wallpaper+imagesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2FB 25152 bytes
SHA-256: c30733cd2dfba6b24eb2b917c2c511c4885c0cc6788beeade30c42150f5975d9
font_01_sfnt_off0001f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000208ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x208AE 10552 bytes
SHA-256: 656bfc2fd84d1129d9bd154dbb6dda88a4d824a98169211a92d00e8cde018819
font_03_sfnt_off0002208d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2208D 16692 bytes
SHA-256: 458fd5205e92a716797fcdb65c2bae78a63634f94c10db0aced27faacfe32446