Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc20ba6f8711e0d…

MALICIOUS

PDF

82.4 KB Created: 2021-08-10 08:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ae58d293927d0e80a505a010c954471a SHA-1: c32649e873a85dab8414281bcedaf35d1194c490 SHA-256: fcc20ba6f8711e0da416a90e9a5a2860bb140b7b50ae67d86304a91a4a93b282
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crewmak.ru/uplcv?utm_term=l%27infern+de+marta+resumen+por+capitulos PDF link annotation
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/fe448f89460dddd344a213c1b4864726/16484281577.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/vubofowewenem.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/wanazeteloxuvezo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f6c284ce8---nejaruvegirijigijuzeviwuv.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/serezotijapom.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5998e95bc2---22667468563.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/95907900763.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/davazujitemij.pdfIn PDF document text
    • https://terrebleue.org/userfiles/file/28476254133.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/88410676760.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1a68e0e74b3b791c7f26717e68a9e5b8/razizikojufoximo.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/23149101731.pdfIn PDF document text
    • http://biomisszio.hu/tmp/porikalalenat.pdfIn PDF document text
    • http://ruihuitax.com/files/file/55455680415.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/65885387603.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/6411438959.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607352575a04c---fikasulanofamiw.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/gcfda8jadmdrb5o0iive4ujp9r/13827434917.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f9b31c2a2c5f29e730b7fcb6e3f862f0/dufegexoreturajofizojak.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3ge38m1lq1jjkundueu7hlpfj4/romuvodepisesipop.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/34070370030.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/gexerisuranetan.pdfIn PDF document text
    • 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_off0000d74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 10872 bytes
SHA-256: 77b92bc6d56f4e45192bf0b8a15593ad49e75c42678d5a2bab85ad5b1aa236ef
font_02_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 19564 bytes
SHA-256: 84077e578d6a3d41b8ae9582cdbfd4d5aed2167febbad3b2fd0d6527d3d7f5da