Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68e13336e413af1…

MALICIOUS

PDF

86.1 KB Created: 2021-09-04 10:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0167e8c2a2a7df4f44ea06611604892e SHA-1: 356721355caefd59393c46b43b4954a9e855e3ba SHA-256: c68e13336e413af1c8bc391f8c247681b21001992cd20df1f9ec6a447a0b6b91
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains embedded JavaScript and numerous external URIs, some pointing to raw IP addresses and compromised WordPress sites, suggesting it is designed to redirect users to malicious content or download further payloads. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f19ea9e8f---xakedoxiludurugipog.pdf In PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/338d1b4087b36ca97762c267ea535790/89391638448.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/bimakabivaxamasoso.pdfIn PDF document text
    • http://dsagco.com/Upload/file/27029313835.pdfIn PDF document text
    • http://sns.hu/_user/file/zunorufajana.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/utvf3ueh87bki0lq92ljbcqhcp/pedesetoxopetusafoligugiv.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/24c165212223afee6fabb2866f49d5a2/fonejesa.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/73823439269.pdfIn PDF document text
    • https://technoculture.cz/admin/upload/file/vozomuwikokakumalawarup.pdfIn PDF document text
    • https://ckd-otto.com/contents//files/sigerared.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/12893400754.pdfPDF link annotation
    • http://artpolyclinic.com/file/files/nobavipozus.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/bc08e864027116eaa08b60488abb527d/zonuzomoz.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/cfda9d80c25aba7ff34610ffd6904cf7/wiwizaxoregijuloj.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/r81e36tphlj92m0qdgp96gi3o5/wuziwugusimatepepej.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/39581440142.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160992809ce2ef---kifivisumased.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/55qq6o64gfqjv4p5bdtp79fmtd/pisisabopiwubil.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/32224940571.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/sazipitum.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210618083108.pdfIn PDF document text
    • http://3sdent.com/upload/files/17451701585.pdfIn PDF document text
    • https://andrejc.si/files/file/77078975503.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/fasutekinimiruzojokurozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=business+communication+presentation+skills+pdfPDF 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://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_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 17388 bytes
SHA-256: 5b59f9bfeee0609e860ab672045d4ac38870ca1728c21b716ff0c855d8e48fa3
font_01_sfnt_off0001188f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A6 11024 bytes
SHA-256: 8251cbc26178eeb7e684cc03c0f0108557363e9dc184fd6ff7b145be221f6339

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