Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95e0ab3a35400ae…

MALICIOUS

PDF

84.3 KB Created: 2021-07-06 02:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 39502f078ab610bcbc41ade47308b32f SHA-1: 7658e18857ab7749b65eee9caa4557816c7b1c05 SHA-256: e95e0ab3a35400aed17919141a0822569cbb497de9aa4748134c34ae097ecbf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or redirection attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious content or further stages of an attack. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/382f7a6d7bf5ec3b5f7eb5831c18b092/13570160747.pdf In PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abca8ac0bff---42529202538.pdfIn PDF document text
    • https://inifd.london/uploads/file/51195446028.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/62861306740.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210530/2105300806593733633fg247e8g7s6.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/lubizovam.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a1305ebb90ca8b5f511e952ac188449b/dadasomesekege.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabb876fb6---38523612868.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/2keg5538j0lm558bgha7tvgvmr/64023166570.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/b349c69f95cfde9e2f6430c7d793d621/95864652240.pdfIn PDF document text
    • http://gibisch.com/files/files/58012851240.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f51f52595f2cd0e30fc7a9048ff551ae/62794246748.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/384e8f1e20341f397098bc6d8cde8fe3/dixud.pdfIn PDF document text
    • http://fitviewer.de/files/file/rugika.pdfIn PDF document text
    • https://paperland.bg/uploads/file/wubizimuvegixiluga.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071505558f3f---7351804023.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b347eb326b2---wedul.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/29595584383.pdfIn PDF document text
    • https://plasy.com/uploads/file/19925721941.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/55350395546.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/37fbc55d34388bf64f88dd1243b77e33/82538326546.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a474c11077---didegadubofobu.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/93491560442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=yellow+striped+poison+dart+frogPDF 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

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_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 10740 bytes
SHA-256: b61908aa0f5ef82702af0665d338db3c6284d70b98fd692d31b65b2bb40178a6
font_01_sfnt_off00010285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 16044 bytes
SHA-256: a9a4d91e31c728bef49a3ee809026f556292012e34fce9117e3a086755f5cdbf
font_02_sfnt_off00012c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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