Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb7a27ffcacd714…

MALICIOUS

PDF

88.9 KB Created: 2021-09-08 23:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e4669e6753af6863de7cf64972b0ba63 SHA-1: b8faf4f5f115ca82bb09dad6662646c5578b3e96 SHA-256: 1bb7a27ffcacd7141d9842432038a5a7cd357154ac47f9f05905fc5f2f561c98
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the primary attack pattern involves luring users through these links, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://laduses.nl/image/file/weximibugemerudepixute.pdf In PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/b5hf6v3fbqi8vmno15spgvcv8v/78191312513.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/8084c76265a9c71121623648412d1fce/rogunoguwofoz.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/9200752366.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/tedagaziwukuliriseje.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///79376307091.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/28997639153.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/95886950487.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/73093471747.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/jeroremu.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/rabodexojitipefikifuguwo.pdfIn PDF document text
    • http://szallas-karpatalja.hu/upload/guxonevuromebodesanone.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/20994784868.pdfIn PDF document text
    • https://rubfila.in/files/file/35301319605.pdfIn PDF document text
    • http://www.toptehnik.si/images/99853993695.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/76716705962.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/22123156540.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/bawilevomaxazifefobilozun.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/82945664620.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/0723c1d923adf861ae92ef6330114a4a/59109890238.pdfIn PDF document text
    • http://dd-eng.com/files/files/3396232794.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/fagogixubujipexo.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/19139381418.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/vesefigumutotuwexusuro.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16133ce553cfc6---86710267520.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/fexofabemabofanoxaxagawuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=copy+contacts+to+phone+from+sim+androidPDF 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_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 18300 bytes
SHA-256: 133eca107c55e903b04f89b436da7918c68638f93da7f81545cd8879a5b40617
font_02_sfnt_off00013c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C43 10984 bytes
SHA-256: 2af4a79f6cfde4b8ae17bf464a53f3dc9aef9a468603a6d200958b248f935699

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