Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac4aba10a286f7e…

MALICIOUS

PDF

89.8 KB Created: 2021-09-05 22:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: abbf32d69b2f0f0910858f087aca9546 SHA-1: 5822c1e37717c43813499e5ca8898b88c6976065 SHA-256: eac4aba10a286f7ea18f38a103fb769062ac1cc286ff69cda8994c8414700bde
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://garglob.ru/uplcv?utm_term=zeppelin+speaker+manual PDF link annotation
    • http://21cedu.com/pds/userfiles/files/50664724442.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/f151ae00771d28aa2d475f5dc3484b4c/sonoregewirenatoj.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a36212e0d0a---dakegomuxemitowunab.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/4739511024.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/vkrajimilg3odcgghjaag3p9na/siwajenaxoni.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/jowifuwovadeveviwaxa.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/toxujasutowel.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/60075233239.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a64c863fb6---tusivagisadewa.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/pogibemusakipu.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf2a8d7a89---tazirokixekosudabeb.pdfIn PDF document text
    • http://thepducphat.com/upload/files/94681611720.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/92251875407.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3482397578---86761969265.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/81256622921.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/gtpqcb3epukv7anu7mr7cn3gi3/pezosanaxarigurimuw.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a3147951df96dc7c38a6cbd0efe07c3f/fanibu.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/312a2350f148c0395b04eb14844f4af1/51263794644.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/kadikaxizimerirefajafeza.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/puwodunojaturavajotaj.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4f0519f0---81831983118.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/71919734556.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/b08f2ffea8b1f0cc6b21f10a557749a7/wanaguvilego.pdfIn PDF document text
    • http://fatename.com/uploads/files/202108221043094566.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/gamagovisumexozup.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/082c72e6745e661978927a2a884b7710/berijijidokaxilekujaj.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cb56a31d1a3d3fe812e133efd181a777/97078344487.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b65922cd9---nuxosi.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_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001132d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132D 10352 bytes
SHA-256: aa84f42b3d09f5e34b49cd9da37bc07082f02075b9d8cafbb98e1d4f355a6859
font_02_sfnt_off00012a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7B 17820 bytes
SHA-256: 18679cecdd58dcc751902382912bee3d793191d56e0246a9c618e528664c1bae

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