Malicious PDF — malware analysis report

Static analysis result for SHA-256 210d364c58be08b3…

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 11:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7e472f3cc0d194ddee1e75548d2489cb SHA-1: 01d7b181afb748168a90936510c5bd6e6e025a73 SHA-256: 210d364c58be08b3cc631fa020feb94223f18427f44216f4b89a4b82e643fdb9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an intent to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/h8r0k93kntspdj54r35h5pvirc/mokama.pdf In PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/dab5c41fb98a708fb76c78187e1bee46/xewisag.pdfIn PDF document text
    • https://dineflon.com//files/dapugeta.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c564791925c---xukalezako.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/garaken.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609214b3ac540---lanemiwakotipewesa.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/79393758043.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/54476213619.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/88596942680.pdfIn PDF document text
    • http://greenld.com/userfiles/61297170687.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b927964b280---favatiwotames.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cd220d0d9---31911565160.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/desovaxusesiji.pdfIn PDF document text
    • https://claudiodituri.it/uploads/86488603719.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d20a1154a1---kilelibidapi.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/52464410497.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/f53919a46cb8dc87e3d76d14680aa800/sefokibatoxatejal.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607112a69ab2b---28100979457.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/bifofopopulodiromevugom.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b81899cc---janowunoxixenet.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/010105415149.pdfIn PDF document text
    • https://vpmemorial.net/images/file/vifebiropaxoro.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/rinatifebi.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/1142953586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=epson+lx-350+esc%2Fp+manualPDF 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_off0000d334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 16932 bytes
SHA-256: 6a2f81e909e8bdc142e70029b12ffadada2f96ce206b1dec032a8d88261c63f1
font_01_sfnt_off0000ff20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 10924 bytes
SHA-256: 6f7aab049c4aeb1dbfcf2564a9ee818d6f0e36c23e02d8c4ea38e584233901d3
font_02_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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