Malicious PDF — malware analysis report

Static analysis result for SHA-256 60503d5d4883de72…

MALICIOUS

PDF

105.9 KB Created: 2021-07-01 00:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6637edbdccfead3079f065b0b631c240 SHA-1: 91b87d9aea4fe48911a99cfde9eb8dc746c693aa SHA-256: 60503d5d4883de72467fb3a52fb937f6c0971035a9906f1fded5c62336f889b9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, 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. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9654

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/da0ad66cf2afe0c7b31d47372761ebd5/32873922860.pdf
    • https://x-software.cz/data/file/1143431601.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16098a5a19b15f---lutijar.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b511123316---kujakit.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/0db3b682dfbd0f87246eb3b83809d0b1/12862671780.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075951e78b71---85436136508.pdf
    • http://ehomeforeclosure.org/images/file/vevimunopi.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/7ssg32iq75kaa8cussb277ltd3/49187417169.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/862aa652d5dde6bc4e96b106ce5c4b93/wexigib.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921294a4e85---tebipakiluwedebufame.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac15140ec---ginisopi.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/931317c2cf87afd1752200934fe75bd8/sijiwiwevu.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d487d9bbeff---19271492880.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160891a845c21d---85826414784.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb60150807---rifuxazorunofimuti.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2g4plotpqgs3m419ik02dbt994/pubawuz.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/f2f0e5612176770c45ceec66bf5ba130/59061671435.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6164e25ee---fevifaf.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160828a7cdf7fd---xaliwudunutigenowewob.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4da9b02cbe---tisetakunumofesipa.pdf
    • http://japan-railpass.info/images/blog//file/likemunavef.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a423c763af0---roloz.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fc6ddfac1---renabonovibizulifazaxo.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/1c5afa28379a200cae1c5973bb4d5307/likagegajuwokusej.pdf
    • http://anpo.vn/upload/files/40318871659.pdf
    • http://oresteruggiero.com/userfiles/files/miladita.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=non+linear+applications+of+op+amp
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001238a.bin
44fb95379e225237f947c32ab79de15212f82e462ae78d98a5fe6c170ae9fa3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238A 18040 bytes
font_01_sfnt_off000153bb.bin
2346d7ccd67fbe7ebed9f8125597eb88acd67b8dadc5aa2d6e42a11b254b432d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153BB 10620 bytes
font_02_sfnt_off00016bf9.bin
fc957477e3397040f94da30bc5be63e085c51646d80411e031f970d1fc3dc2b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BF9 16156 bytes
font_03_sfnt_off00018170.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18170 16792 bytes

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