Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd201d6a00be4be…

MALICIOUS

PDF

92.3 KB Created: 2021-07-02 04:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b07ea5849aef486a13bef149b3c3b7b5 SHA-1: e6748a17527c03740f7ca30800eedf71d2adea4a SHA-256: bcd201d6a00be4be09d94bfeb07a1a38ac275a2698f7a85146945cbff24bcb73
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://brmc.jp/user_data/userfiles/files/wumofenepebatis.pdf
    • http://shinex-auto.com/userfiles/file/zoletilozevakuzajex.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/94de6itfq94n6qoqubc07dugno/48475828781.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-6-8/20210608061853433020.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/ee3ac3185139115b500e7bf4559c3716/fuvanipimawurofum.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082374c2640d---xewowe.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8bf70e7c9f98e66a660de3eaac63b3fc/27617205392.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/66bc175cc2d13f2dd24a7ac5865953a2/genonifipibiwu.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ccd95422c---belotid.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/q4nie0tlvfkji89dnbjfnc9d2r/32365969517.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/184p9lh8qml71g0n2qrl7un6g0/52270781748.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c02db8471b---6168771972.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07d8b9221---31974061376.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/c67c32d52e9576f7ec3e16c06f2f124e/letupino.pdf
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/77102563677.pdf
    • http://biomassasia.net/data_ed/userfiles/file/godaxoguzulozasafobu.pdf
    • https://chezgregoire.fr/userfiles/solazasivexopavomozamub.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bfbfbd842---gimupezegevezipumokonomek.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4e08ede252d05d6d0184410e319df8a7/ruwunagovuvodaliparedulan.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff2b069cf---kalegikafedomuv.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/1076a9429291804509cb688453d7586a/10613052902.pdf
    • http://www.rpv-drachten.nl/files/file/52795875267.pdf
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/22804261073.pdf
    • http://ceomit.com/fckupload/file/didowelo.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2e191a44d---wefikogafo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=convert+pdf+to+readable
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102f7.bin
13f9758aef9b175f52d27cd5bcad1651b91fce8a67b477a98f3ae9d88130859b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 10468 bytes
font_01_sfnt_off00011ab1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB1 16792 bytes
font_02_sfnt_off000132c3.bin
1c56c76c14925814982571b9cec5aa31b726e432f5f3dbb9cc9e31a30ef8ef79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C3 18492 bytes

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