Malicious PDF — malware analysis report

Static analysis result for SHA-256 5330f06c35cd26f6…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 05:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4a9089bf0aeeefdf381dc7eaa7c3014f SHA-1: 4c18b72f1d878da11bd400cb6c2ff9964a09f02a SHA-256: 5330f06c35cd26f60107c039d3296b110fe4f8cba42346d8f4f30c3d2302747b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=tweaked+pokemon+go+download PDF link annotation
    • https://aglogistics-bo.net/userfiles/file/27055697494.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd2b67097d---21956236523.pdfIn PDF document text
    • https://promtour-rural.ro/userfiles/file/lunafagulotij.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/25690101119.pdfIn PDF document text
    • https://wsbtitan.com/images/file/19267111184.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/futivinoromevujovagomun.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/xifop.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/83383623620.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/27014540238.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/73460951226.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/2ngscokn2o9ua632gbu5domhi3/noguzasatiwigosasozix.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161355da6d16b4---kolufoloterev.pdfIn PDF document text
    • http://cke.hk/userfiles/wanawu.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/tugaw.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/vedizadexikofuvunaxaf.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/negupirabiko.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/nujexirizurumefo.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/415da1abc2f44b01faf1018083b1b212/13334756844.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/wunika.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/61940554738.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/wibojezuruxikubuneg.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/50607712116.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/dff64dd1685bdc89cc74f6d43c5035ef/kedidinunagirixu.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/rafarazopurotas.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 19304 bytes
SHA-256: dfedf3ca400ef5c650f53c752e9dffa4668309c0efce17454e53e56d1f70f501
font_02_sfnt_off00011dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 10420 bytes
SHA-256: 459cb357a214181981a02d61a51fd30ebb07a288ac8cea9aa7fc01ba2748130d

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