Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f48d4bdf5611c3…

MALICIOUS

PDF

77.5 KB Created: 2021-09-08 06:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 28d522e7731399412d926a978fe93574 SHA-1: e426fa8df9c2c15e1055a00952afa1c62a9a60e6 SHA-256: 97f48d4bdf5611c3f0bbec407366f00c40e2ed4c745ab8590cf10c6a05591da5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress upload directories and other disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/a146793162d07b5948d5c64b2c58f627/makarukilala.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861b6539c10---21672195483.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/423372b99cb79eddf29c9983bbc49ae6/ziboraro.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hlabaaaih2r6l0rkgirlan0kr1/33039815389.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/5dad8e243b017d4c3a8bbb48562c8192/5617039477.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/33007662670.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/dekutixekaf.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/relikuparomorujosiv.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/larenukemom.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/qgjqpc0n0cp9dtk5omq2plf653/sigugozimapidovatetulafin.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/wodulevejanerejetibipu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077d0dea70b5---48646665535.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/85931753686.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b03f449e72---sewajoleratusikifix.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ec97743e6d6---dininepusofirapusufekixo.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/25915564946.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/c1ba4a94a7efe73e06352a873a2ced32/kuririrojab.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/12092967828.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/78423601455.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/20129369022.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f35baea36c---begajiwosawipuwaximijudif.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608129d2b3486---pizupexugekuviwatotujilov.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/33249967721.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=convert+pdf+documents+into+excelPDF 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_off0000c940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC940 17564 bytes
SHA-256: ce7989fceacb58aeca827c2884caf387c51be099f6e76c0462cd09b6095ef3d7
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 10916 bytes
SHA-256: 7486d995376961e2f8a5a4e2a3f0c426a1fefd80fcdcf4493e8d7b370d3c1d9f
font_02_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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