Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa3787f81ca5fdd…

MALICIOUS

PDF

92.9 KB Created: 2021-07-26 01:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 02beb9ffdd370059322b222bee9b3693 SHA-1: fe2b825d9c4ce85fe298e9c2dd647186399b7cca SHA-256: 1fa3787f81ca5fddb910837bb35e9ec173a3656b28c764b99d801e3b2f298b91
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised and disposable hosting, a common tactic for distributing malware. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download an archive and provides a password, a method to evade gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to facilitate the download of a malicious payload, potentially using embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://yomamasushitogo.com/uploads/files/zuzux.pdf In PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/51899725206.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607843b3f167f---76634089585.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210620133346.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/xuxilajokumakolar.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dd7b8s8uibhmqm57n66uvb5hib/1483331614.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/45817861133.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bq30m10s2jhhv6tt61mkl6pqgm/75209434694.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/77777947618.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608910c1ce47b---pelebulalife.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/lezoza.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160792a5b86084---2500597546.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3050bd4e8c---54199350795.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985ad270a4b---gojaxebolira.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zoxapu.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/q04lcv9a9l1qm8ojosjr62393s/lewativef.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c672a3c3f48---15794482353.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/3008461ea16d5bd065b515c206bea7d4/nojixutirigupuk.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/besiluwikara.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/49eb033d005592fa582ef0e4acdeca1b/49169145838.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/20413298575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=descargar+crack+movavi+video+editor+plus+2020PDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbdbc9bda6---zanonigijijet.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FC 19344 bytes
SHA-256: 91cd251765cc17850b739972f1a480cc134c2b76c21576ddbd0cb9008e2753a9
font_02_sfnt_off0001493e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493E 11252 bytes
SHA-256: e04ef47cac34911689aed0e4c134c277a03ccc0e5235f3c74a31f48de68fd7ba

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