Malicious PDF — malware analysis report

Static analysis result for SHA-256 88aae094d9a61586…

MALICIOUS

PDF

83.1 KB Created: 2021-08-20 17:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fc3398747fc0341cbe2d00deb25dfe12 SHA-1: 0a00b84518e8d9eb9b30a5dd81723860655858f6 SHA-256: 88aae094d9a61586544c92593e95e6b05ad0aa50a6cf2f3fb0d28149b64b2139
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a focus on directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/65ac2ab23fe5c60a3a4f923afd9779f8/rozuxisekaxir.pdf In PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/77351725549.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/9069632707.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210716175345.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/raginibakawozaxelepet.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160aa227c4b7b6---42111896789.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/toxuxopu.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/97426825060.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec547199aa---44809971103.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/40197470239.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/mulikan.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/hrosl2p7amv3dhvhta8p3sf1t6/95969119120.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/14805745516.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e776f9182194223a48d23ab2631af24d/45308947234.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/90770947902.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/famopegomutakutesegax.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb759a02f93---99365231629.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42a004b596---fususukobupapuwogijat.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/paxobuvi.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611b416cdcefc---35865440306.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/geguwijugamuwujizizovil.pdfIn PDF document text
    • https://ubranni.com/uploader/files/87245121367.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/81024236868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=stata+16+free+download+crack+full+versionPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/59aec2e3b1008599a9aeee82bbe341fd/pimuvibodaxekajikomumuti.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_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 17892 bytes
SHA-256: 238f95b05fc5128c05add5d32cc9d2a04d7bee593e31758ca41b0038c2ee9aa5
font_01_sfnt_off00010bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F0 11108 bytes
SHA-256: a08ddc0ddeda4a9e39209db7f78fc59b45b2ee2dd00257ab71053acd49f4967c

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