Malicious PDF — malware analysis report

Static analysis result for SHA-256 988af92450ede161…

MALICIOUS

PDF

98.3 KB Created: 2021-08-15 22:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: baa954067d9259dcdc453e17971d234e SHA-1: 0921722b3a571327d222ab66e76b9558b95192c0 SHA-256: 988af92450ede161831ccf8e3882a3dbf809b921a5a41aa095ceb2c52332bc1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. Heuristics suggest this is a phishing or malware distribution lure, as confirmed by ClamAV and ML detection. No scripts were extracted, but the primary attack pattern involves social engineering through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://irlanc.ru/uplcv?utm_term=natural+life+promo+code+january+2020 PDF link annotation
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/80ebc5ad8eab3314526cd9277dfa1cff/4814827813.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c5d081d7e230c0a0c22dafe8275de201/30813641287.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849b0472a9e---wiwibulebuwukizebu.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/k0kpnomb4katac18d78ccat2af/94939234741.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/zijufilepuneb.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b34e661e0---matorapamorudawiri.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16077aeca0f3a9---wevajugoloxedaroligebijak.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/82200331350.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921c76163de---bekatixidilibeboga.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/bobawudonopotiginisazume.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c7771867d00---supetinusapijoviwe.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/juzefodorevefimajulo.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/q4bg32q5d53p5mr9kpnp6evbkr/sidejas.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/zetikejegonelinadi.pdfIn PDF document text
    • http://melabo.com/upload/files/30968323513.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/zerejiniwejijozobu.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085cc339552b---79287754284.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/zogerudojakadoluluwipak.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/19843919007.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/dezarukotagovudifoderowag.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d840777231f---kusunobazexojoribon.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/dubukixazakizuribi.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/p40i50ln3itl7jn33si6oicnd3/wuvatamolira.pdfIn PDF document text
    • http://alkanboya.com/files/file///lefisalipuberes.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/wifavupimafulerugatireb.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_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 11176 bytes
SHA-256: 58ce0bd351bdafb572a27a34d8b998d1946fa7102ede32c770a8ac821292a235
font_01_sfnt_off00013420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13420 17784 bytes
SHA-256: 89a79a6b435e1d72a7f4584fbb6a7f8f928fa8f4b59893254f3205f4acf2bf79
font_02_sfnt_off000162c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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