Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99f72727e795da2…

MALICIOUS

PDF

80.7 KB Created: 2021-10-25 14:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-14
MD5: 8d16e61490e86453a2ab87feb2f42fc7 SHA-1: cf322cccace92cc39324c48f2b4e56dbc8f6f6b3 SHA-256: f99f72727e795da20601354411cdba12594b0341dac0dd883a38e2146a34ce8e
156 Risk Score

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 http://ansatrans.ru/admin/ckfinder/userfiles/files/94314996957.pdf In PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/c58272f38025adb8f0c618e4a4f3e860/pazodewapufevamoruradalaf.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/rufagitopol.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7190100884.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/durenigomateva.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/wesezawudupupixatafez.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/42400560690.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/31673741431.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9c4a0e99ef6789bcbaf2bafa6d3b79c/61699773140.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/vujudoxiwujizezes.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/xatutidevaxekapodupes.pdfIn PDF document text
    • https://cathita.vn/upload/files/21663695080.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/dosapupunujejewipuli.pdfIn PDF document text
    • https://topupdana.com/contents/files/kurilutedelipob.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/vijufawexirixu.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/kudefaxi.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20211007033630510.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/usk59g98l530c3uuhrak3e9507/34344265960.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/30426169150.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20211023141141.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d08a036626---wudagirapoki.pdfIn PDF document text
    • https://clove7.com/userfiles/file/folejipijoforerusur.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/furegiga.pdfIn PDF document text
    • http://medica-brno.com/files/73278417166.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/oscUj7J0Gjw/uplcv?utm_term=difference+between+multiprogramming+and+multitasking+operating+system+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_off0000d69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69F 11496 bytes
SHA-256: c7bc558f05a848a9c22bf554a0483965cf3a94ef89f64d85acc6a203ed118941
font_01_sfnt_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10997 16488 bytes
SHA-256: e7ecec57ccf075cc20e597655ea2711661ed3b53c4b3865e9f95af4810d9d993