Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7876f59d6938ca…

MALICIOUS

PDF

85.8 KB Created: 2021-09-04 16:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e532d87aab6977ce4109ef2996f21d26 SHA-1: fcb0f2dd827cb391922abc1656832a01b7dc7125 SHA-256: 1f7876f59d6938cad60f75190afc51de491185d6cb9f90a15b667cdc23358cf8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, pointing to other PDF files hosted on compromised CMS uploads. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests a business email compromise or phishing attempt related to financial transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/0dd01c3e3d9cdd396d02104e2479dc50/44564228553.pdf In PDF document text
    • http://sl-light.ru/design/img/upload/file/62914272398.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/2234897491.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/10620373751.pdfIn PDF document text
    • https://anfauglir.com/images/file/30125088159.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/20144753872.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/jipawowamazew.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a2a95d304---gexixebegobolifagak.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9a34692b1---34924813697.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/95c0ebcbf816122c48833eb5d8e15676/6196237938.pdfIn PDF document text
    • http://szm.hu/userfiles/file/35050698936.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607302d746c69---kosisuraxewukavuv.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/57624677474.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/gelozilakovijefinuzol.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/89200393541.pdfIn PDF document text
    • http://trevorhannant.com/39309159450.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/75016076433.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/743d671qodne8dt3am31d18l78/pinipezatedezojavifefekab.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/39971901856.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/2gbmhspl1jvssnii39m3qanq16/gebidu.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/65738cddd4d0de6764f31d52856a5457/maloxalanogod.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610069d4dc651---67823366976.pdfIn PDF document text
    • http://parilka.by/var/upload/file/zinizelejatute.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/biwiwunenowakamebiz.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/velujinesixoj.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97efd953eb---mafesexegivotopujatulofe.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b611c4ea261---dewuzetawabeterubuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pan+card+form+2019+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_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 18420 bytes
SHA-256: c11b1a29fecc1f077ab497d4eddb3e4ade629394fd315172a6e3c1e868e0127e
font_01_sfnt_off000118e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13100 10708 bytes
SHA-256: 3306e74531df26380e7baedcf1d25d5b616853e5bebfb0a33b86019a4a74f5c6

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