Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9d7945d9c94dcb…

MALICIOUS

PDF

84.8 KB Created: 2021-09-09 10:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5ba8925bfb778cea0584f9e15ff46538 SHA-1: d15591e268d132323e633858bd99989cf3ecc96b SHA-256: 2c9d7945d9c94dcbe46233a37c04b3d0439a7d771d8ade0e4b5a40b673173127
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and a link farm pointing to multiple PDF files hosted on compromised WordPress sites and potentially disposable domains. The primary purpose appears to be redirecting users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pasifikendustriyel.com/userfiles/file/45849984706.pdf In PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/79216953632.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/zubenagitob.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/67912575564.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/92578489407.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310b68bae7d---42142335765.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/vaviseg.pdfIn PDF document text
    • http://poiskvod.ru/images/file/pituporixebe.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/gegavuxejepemexizak.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/gijevibozagu.pdfIn PDF document text
    • http://charontrade.hu/data/file/95860717769.pdfIn PDF document text
    • https://wsbtitan.com/images/file/xatifubuwisilube.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/48067889167.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/28993261558.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/pulunaw.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/xamemu.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/safibejarejeperowovorop.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/kobutafasugidisu.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/6d1e6a6a895ef89b5b1f9b8e75c928bf/weraruse.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/12221848269.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/a70fcdc1eab025c486ae88216e533739/jawawo.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a5eb91f0b---fuvabanifexavovilufolige.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/xilataxun.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/2459a7960bbb6c2031791294e9e55e51/12774097678.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/tozabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ejercicios+funcionales+de+colchon+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_off0000df90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 20832 bytes
SHA-256: 3c0fdc367b823391efa7a8659056b792e0d00e79c9a4be7bf1e79d13762413f9
font_01_sfnt_off0001145a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145A 10832 bytes
SHA-256: 21536162cec7aca8658ba606974aa1c6a972d59acf908bcce7f94b412ae25531
font_02_sfnt_off00012d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1