Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e021d5890986e3…

MALICIOUS

PDF

87.0 KB Created: 2021-07-06 21:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 69be37afacaa9f074951227e8a9369fe SHA-1: 1fc1430c88e126fa1873dff18a92a390c0d75403 SHA-256: 41e021d5890986e352a97fbc1b05569138211aee39e239d533c84d09219f1d92
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Several heuristics identified the PDF as a link farm pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while numerous, do not appear to directly execute code, but rather redirect to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd9ab7b320---17315763489.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4g0hdjdam2hjj60ip1pjm90eto/35095150976.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/wewamasovik.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/4788752138.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/zobobovobetifetarak.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/rupupuzifupikawimanun.pdfIn PDF document text
    • http://abpaluso.com/upload/file/dunoruzemediparo.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ea41d13be6acfe7f218e44e1c52aff85/98551218399.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85dd468a51---29479284888.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/suzakedu.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/10842517040.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084a2dce3b7b---redafejewivuvamos.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/rj7vl7970autq5l8q5h7jni740/vunokozevozafugivuba.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/35604358254.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080e4cb29cd1---rizubuwofarubazetiwuwew.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f4db8b946---jijugomekur.pdfIn PDF document text
    • https://cristalensi.com/public/File/sumezizepedaxenetigafof.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/53237097513.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/jituz.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/27pskg8egdn1674hrbvfu4495u/18179556725.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4aed47f12---xagumaberumiperisixojin.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/1fae94fa7e4052a07c58a5240baf832b/18904803758.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094938c636a8---ririfirenibivivopawuremu.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/0g8maecpii8lvrl8ph2jcl26m2/99084473571.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ci07l5imnl470eaohpq0jj7n5t/21236193707.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160894ac440606---91773966889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+unlock+each+character+in+mario+kart+wiiPDF 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_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 17496 bytes
SHA-256: 5ffa9b1d4aadfa48eb1c27700bef74cd95b30766671ca83adcf5859eaaac80df
font_01_sfnt_off00011e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E67 10596 bytes
SHA-256: dab107a8f7dbedb1d197d0b7b4e922b1d819d7e32e7ab55666e852b68d4769cb
font_02_sfnt_off0001366a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1