Malicious PDF — malware analysis report

Static analysis result for SHA-256 2594ec85229c7e3d…

MALICIOUS

PDF

85.1 KB Created: 2021-09-02 09:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ce61e02eefd7c1b47a7d81e409e78805 SHA-1: c7b0c2514543161aeb8982686b3e88c95bf3be73 SHA-256: 2594ec85229c7e3d4803af5c2a12d5ff8bd5f3ea24af1a634906bf01e2156592
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The presence of link farms on disposable hosting further supports this assessment.

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 https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3ae0d30ee---vekorofikesefedodojeda.pdf In PDF document text
    • https://bandotrading.com/uploads/file/48575230601.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202108231632087957.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/qcaaulig9is5gm54uhu030otum/kuxowanesixezol.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/32747627879.pdfIn PDF document text
    • http://poaglasses.com/uploads//files/202108110350597273.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/12595744941.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/309074689b6696df86097a05f01bbb0e/26964325308.pdfIn PDF document text
    • http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/belireledawebipajujuf.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/ritebodogeduto.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608369a698b9a---1373783520.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/xibinojutawifokafemub.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/78a51d7a26625286954a152100edb445/valisude.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ac021fc66---xurapokola.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/pipudojezewujevelosigi.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/loxalevasenew.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/7771652048.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a2992cc5---benimoxim.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e16941e59---81383229515.pdfIn PDF document text
    • http://ud2-140.com/files/10064498655.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/80887353596.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/73245529793.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/12384293097.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/teruridakovexexufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+are+the+tools+for+fiscal+policyPDF 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_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE51 10580 bytes
SHA-256: e79510c54a7c5cf1d43f764e4964101fae8ae7f89ba65110c733eaf5f4b6c37e
font_02_sfnt_off000116a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A8 19052 bytes
SHA-256: 6666378f47b9d6b3f0acceb2b6e36d583ad820d2edb51d0a733bba384c21c0af