Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeb262e0a3f3c32…

MALICIOUS

PDF

92.7 KB Created: 2021-07-31 04:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 522d9278f6edef01fce301150959ba0a SHA-1: 758a048fc2c550a1197159ed15b3a0f646a99943 SHA-256: eeeb262e0a3f3c32e71a2341261285bb97fff203922120372948f5a04e59b064
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, directing users to multiple compromised WordPress sites hosting further PDF files. The presence of numerous links on disposable hosting and the use of UTM parameters suggest an effort to obscure the true malicious destination and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d49da1a419e---lalobewokaxuj.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/c8a6752deb2c52e75307accc9c4cb25f/48334325166.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16cb58a9b---wevusesozekejew.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/vefisinimumemaxeru.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3a7ff90d6c97db643d65e211e21b02b6/28378348190.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/36944871610.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fa6e34335---fuzifir.pdfIn PDF document text
    • https://hojoairport.com/images/file/57605091746.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/50297100417.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/3e96be16b6cc67bc2a37fa69947c2ab6/xezedawomezuzeputabu.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/72shu4ghqg61e13ip2il7hh4j3/vawifajibuti.pdfIn PDF document text
    • http://thaide.org/userfiles/file/91162248318.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f4494572e---20857245722.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de7ae65cceb---rigatujufugis.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/qprs81i71ivetknl82tvuf4ku0/30246455549.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/runumiregeguwobosevabi.pdfIn PDF document text
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/68866811030.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/53904266449.pdfIn PDF document text
    • https://taperagi.com/contents//files/walexubikuvupatezo.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/serelig.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090121751f68---72694498501.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/numeteloxosimawu.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/3j4gmlc1n8dcl3jpr7qc92948r/wogelamifitewug.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1b46751989b194392800f545298c4651/wujakinununusugojexaguxev.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c1328da89---tobugepoloxobawitixuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=shl+occupational+personality+questionnaire+pdfPDF 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_off00010543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D55 16976 bytes
SHA-256: e20ba3637ca79f4a61f68d1b53569e6d6ef2289691a040ca3dd449900ac24628
font_02_sfnt_off000149d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D4 11152 bytes
SHA-256: fe14f155603479f99152c7a7c01205a0ebe304a7f245b62689545028515c584a