Malicious PDF — malware analysis report

Static analysis result for SHA-256 377e5c96cdae2cf5…

MALICIOUS

PDF

76.2 KB Created: 2021-07-04 11:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4914c771fafc8c0caa3940cebca90228 SHA-1: 38533f547a5ac934162a2daaa24689c30d0796c1 SHA-256: 377e5c96cdae2cf514447075e2404ada2a7b4bf52a91f55378b3d35fa6eea52a
164 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple compromised websites, suggesting an attempt to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe5b13c206---fituletipekijapojosas.pdf
    • http://austria-ex.com/images/blog//file/badujiwijedisijezavitikat.pdf
    • http://www.euro-fly.eu/userfiles/files/tuzebokinis.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ede0ab75d---nagojonazidi.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087977b050a4---98824371395.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afff9253f47---68796324071.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609adee7a1edc---11999983030.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/a4910ebf35fad77df0946cb3011475fb/92734293297.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/lisedu.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c949b8a8f37---61031608416.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/fpjb9ain00jr43ofkhsblrjl94/nawadixite.pdf
    • http://sarljarry.fr/userfiles/file/zesevubu.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/bd8d6c0f47afd9007a4c4b369b688fcf/pikatemujisufa.pdf
    • http://aucoindeshalles.fr/menu/file/50300678308.pdf
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/7286199600.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b40bc8a99---dikamuxolobulorewaf.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af708689566---72068384615.pdf
    • http://sethhukumchandschool.com/userfiles/file/larujofebejom.pdf
    • http://tragadsonisurat.com/ckfinder/userfiles/files/kesalof.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609497b56f7c4---57895044420.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737e70c2709---pamazesavepo.pdf
    • http://lukasikgroup.pl/Image/files/9124050316.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9b6d7676---kisibajabefaletiwi.pdf
    • https://aronabritcan.com/userfiles/file/97554619647.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=chemistry+class+11+guide+pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ee13764edda810282c8a812db6cf4a23/93960604384.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c644.bin
6d7784867e31d2868384c3137c8f27a65dc2c9a1d51c605d254f8cd9a7907488
pdf-font-stream PDF embedded font (sfnt) at offset 0xC644 16892 bytes
font_01_sfnt_off0000f1a9.bin
fc8f417cefd879f57f913e813d59e6d0ce875524e41c91c9834f00afd8d48c33
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 11140 bytes
font_02_sfnt_off00010b98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 16792 bytes