Malicious PDF — malware analysis report

Static analysis result for SHA-256 689e59f3f1a66cb7…

MALICIOUS

PDF

74.3 KB Created: 2021-09-04 06:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9eeecc28f8a54e79db7df5e0d2fa6120 SHA-1: 0eec6b325a991923be4267fa8440b7c1ce391cd6 SHA-256: 689e59f3f1a66cb74272d680a54553e54f3dc7e684ae23e03bb7f2249e11ff20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of link farms, suggesting a phishing or SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://garglob.ru/uplcv?utm_term=appreciation+speech+sample+pdf PDF link annotation
    • http://yishiweb.com/upfiles/files/20210601_141404.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/sigodibiwokojasikesikupij.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/75685910027.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/vosusikuzakenusosab.pdfIn PDF document text
    • https://starbox.fr/img/files/74164633287.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/265f7b2cf34ed1b17f8f6985688d4be8/dasapinarilepugojexoli.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/64490450464.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/reporukomafosu.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/0dkr2519iljjji7estf6otd2js/13579894265.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c49be7ec491c21ffe34752182fea923b/pakatiwinidudukejipizatof.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de601f9e870---wunezokajiwusorudugomefit.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/93191845179.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/f973662b1e12b75f51baeb5296a6e293/babekebujema.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d3b9d7dad---bomezuwo.pdfIn PDF document text
    • http://blatt-gruen.ch/files/32013619975.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/e2fa41c2642be5a367162f4112831874/xuzulajuwagatomiwa.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/93689632893.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/xoseranulesebusaxegovana.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/hhhq8us79ofuovjovsa6a70fi6/91501497056.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/basafanaseremipanope.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/tojovizusi.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/4147286592.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/30247539226.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/sazotodupilazuwefexiru.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/jolevida.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/74bpc3q6tti897f96j7tvjtij6/57664332976.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_off0000c056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 16536 bytes
SHA-256: 6901089eac7e1cb34720d053dad40e272cbe40275d65b2478abd46f159134186
font_02_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 10868 bytes
SHA-256: 0b1570b8587148eb5b3d0a9df4e5bfca0c194b6d94965cf31e0e8ade6756e879

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