Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebc3e876f2a6726…

MALICIOUS

PDF

98.8 KB Created: 2021-08-06 20:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 514c32e2d425ba9c1ab657e925d46c0b SHA-1: 2fe385c9deab3a88623b98d5e8855e379ef49f00 SHA-256: 8ebc3e876f2a672608b38660ce0a6575df6a557911e8417e117f22b9c32413f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate this file is likely part of a phishing campaign or a distribution vector for further malware. No scripts were extracted, but the PDF structure itself is used to host and link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c145c3b761b---12865619343.pdf In PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/3e37f6ad713fb099155c92e86681a2ab/63245550931.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e931e0446cc---70617009510.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/livage.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/95837757368.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/pevezamonasopoxu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/m97jna8mek6kjemq86j8kjlql2/tedaritezetu.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/zeveligibibedulevome.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/8c4735422aba239564fe0322fec5f2c8/motemoxipivo.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/busulokagabu.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/rpleo6fpto92ghimm33d3qieug/nawawajalapobixija.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/90373596907.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcbb1216eb---49185806092.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/e1b5602af851475bcac500c7428cc67a/rogikokaxepat.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c8ddd7d9a9ed95d816196473365db1ae/24580486703.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/dafixibotajodabi.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/vqqt82884anvus9a8qdlr1ootj/30151590257.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc2b11126f---ferifugewufomel.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/xopexabanapokemowi.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954840b5bef---winiwonaweloxu.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609456992eab7---zejuvisijuzalinobekujokas.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f7947c754---2730068178.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/5150197845.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/23650906030.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca19ca4b1e---7094981150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=writing+linear+equations+worksheet+pdf+answer+keyPDF 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_off00011455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11455 11308 bytes
SHA-256: 456e9a2436122e058d8557a5b6b2efddafe8b4212dd59957fb4cd06307081679
font_01_sfnt_off00012e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14679 20072 bytes
SHA-256: 49f2f1b8f29232803e356375b591b3bf043e6a92affd700fc525999ca40ad6d9

Open this report in the interactive analyzer, or submit your own file for analysis.