Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9605d0d7c69054…

MALICIOUS

PDF

86.8 KB Created: 2021-07-08 01:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 958a18ccd621eb6d9f1d5c32f96da29c SHA-1: e86f4fb37d45b93f34682954cc3e53378f618fab SHA-256: 7e9605d0d7c6905460d206f16631c89538e0095dba66163992c28c088d8f74e6
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were extracted, the structure and URL patterns suggest an attempt to lure users to malicious sites, potentially leading to exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://ji-tien.com/userfiles/file/kulanurujizivuzosi.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fho6iehii44e67inb1np7ltg73/41504283539.pdfIn PDF document text
    • https://loctra.net/userfiles/file/31684119374.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/1489108305.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/78608584042.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d613ee5fc0---13074654556.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086a94ba2ba8---xolusutuzogedubekojola.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f0ef4c130dc1c5da498cd4d9416b16d9/bibipama.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e60b77be45253a6fedbaf94fcf34180d/7937861936.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079601de07bb---61940757499.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/pegejipipofupaxojugakotuw.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/suzenofeje.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/3642230250.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/61396438206.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/bidisuzolulaf.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a31e902ca5---42145529298.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b770391b90---74466502955.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879779f1ade---sujavojuvabo.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926c876dcd1---6208041781.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc8502236d---winupoxevilig.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160850774e8501---jilijisipubegogosuwabeza.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb5eee510---sozawo.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/cqp2465g6jol6s3onh8ao165lk/vafekosusadipegitisujaso.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/72a6888a029cc2acc5e7fda4c5bfb57f/xepituwuputejakixeno.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/92904344512.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/wukijopaluxosuvipesoxogu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=mhw+all+campsite+locationsPDF 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_off0000eeb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB2 10620 bytes
SHA-256: b02289ab1d8489b2d5ce1842b85a326c4624db5adf59738a8bd448928e0e2513
font_01_sfnt_off000106df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 17716 bytes
SHA-256: a9111da17533a0a2de5a229d6019cbb01808d2e418c457780c78027be8ec5afe
font_02_sfnt_off00013577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1