Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bcd3bc11fbb36f…

MALICIOUS

PDF

80.6 KB Created: 2021-06-19 23:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7ef3a2e919e226172ef1fd72373cdc74 SHA-1: ad4af0e190f564aedbe2aa171d88905f9f5d6cc1 SHA-256: 82bcd3bc11fbb36f6623a6c20d677575210d3f1573b9019f8fb2d45822519c77
172 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded JavaScript and a link farm pointing to potentially compromised CMS uploads suggests the document is designed to exploit vulnerabilities or trick users into downloading further malicious content. The document body, though heavily obfuscated, contains references to 'Croods 2' and '123movieshub', likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sys-svinding.dk/userfiles/file/16232133418.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727578a0432---xotupobexilujas.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/97646625980.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609192478cae3---50497381971.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/b80d9dbd80e01524bd5e94d82660dc09/427047295.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/duwosevaberox.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7ca15978b---biwizowume.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb32390b8b---jimel.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9ebccbac788f226625f60ca8463a1cef/81741896093.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/rv0uqvvnr5rtdkoj7lv24gtkm1/fetupuzojerejazimo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160965e959e530---49643035587.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/hn99ki5aftsc2ucu1hksosed7q/45859730123.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/3003cd653f54dc5c4ed5ff40ea6d0f23/72808707431.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160944e97658f2---tixijoputa.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a36bf8c793e---21075558150.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bf8f32870---rajowosazurejogus.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/72314590419.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/katidebererisasorajawez.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/7567305936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=croods+2+123movieshubPDF 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://scripts.sil.org/OFLIn 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_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 5276 bytes
SHA-256: 9c8974a274813188abb3d2afc71db240c9d615f711c3ad035dd2c076b3061ac6
font_01_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 11192 bytes
SHA-256: 848a0c878f1c5b70bf46c2df0205b63654c3a6638d6382834455bc6e70f2ffa6
font_02_sfnt_off00012064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12064 16064 bytes
SHA-256: e456b5595f6e624407e10960d432782794320480929f7deed69280b081edb597

Open this report in the interactive analyzer, or submit your own file for analysis.