Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b926b31dbb8618…

MALICIOUS

PDF

86.1 KB Created: 2021-09-10 08:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00821c355e0b8f0d36b31a602f7b920d SHA-1: 470f4d780e3cda6990fa20a2b282443b2b618242 SHA-256: 62b926b31dbb8618df8e5c9ddc43392435cfa36e80f9dda3ff4eef1f1a724c7f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection score strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ada6477aaf---78237856412.pdf In PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/64217699192.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109100008369781.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/sogelebakibi.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/lavorerutunekuwigonaz.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/wewapinedamebovezelurude.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161353aeaac9b9---zigofezi.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/ripubanat.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/pubepelaweduzezejikot.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/96288fbf952164bfafb18a458c02872d/81126193407.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-4/20210904083023440920.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/50085925299.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dd2e41c76---zonulesexokonalumali.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/23878480185.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/47030923107.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/jupepolebutezisa.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/jomewoxemomosijasu.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/78037891893.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/dabuvajuruponamuxi.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/libanujag.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/26484883086.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/pimogixoj.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/fenep.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/88493981362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=unseen+messenger+app+free+downloadPDF 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_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10744 bytes
SHA-256: c16de60d2ad776eb4143725e04971e8aa0d9ba0d7aa6c131decf462374c07947
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D16 17416 bytes
SHA-256: e4e390e5fd494e907d0454fb9e55c7ab352f9dcc0cd3cd28a2c54607dad53a9b