Malicious PDF — malware analysis report

Static analysis result for SHA-256 089eb142fbb12db4…

MALICIOUS

PDF

74.0 KB Created: 2021-09-17 20:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 135e40834d717e77f73ec844bf39c1f4 SHA-1: 1f30e9d256215acd61ae4c3a2bd779c18204a54f SHA-256: 089eb142fbb12db48bd973e12ee1badc543dd4b093f4430fe587f9327df7728e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to redirect users to malicious websites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://travellifeafrica.com/ci/userfiles/files/wivikibenekojap.pdf In PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/5fa845b0905e3bad21dcfec59b343be2/84563929053.pdfIn PDF document text
    • https://badrivishal.com/media/4266365482.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/b21baeop2750v8qc7878iksder/6367050585.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/dijixatu.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/sirajesojuma.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/4fc1106e0bdf8d27c7e7164ab3ca5791/51131749342.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/disigumojivuva.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109090819405980.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/83464806648.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613640bf96dd4---rogotuveminixatutukuwo.pdfIn PDF document text
    • https://vinacoma3.vn/userfiles/file/13245199468.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345e9dd227a---rasezaturoborexiker.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021091121152973499.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/84711626255.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614238b95e2a6---kerelobe.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/mavifo.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139aa6ed68ba---61112570530.pdfIn PDF document text
    • http://watch62.ru/files/files/16376716877.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/fozorofewusari.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161408ecc1c5c3---82704916722.pdfIn PDF document text
    • http://enricobarraco.com/files/letiwiwamabegemaf.pdfIn PDF document text
    • https://magerp.org/upload/files/wukofogerefadosar.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/jojibomefebefutedewixuwu.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/mujulozizumeredaro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gacha+life+2+iosPDF 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_off0000c238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC238 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4F 10288 bytes
SHA-256: 0a491b19b73771f9e9909c048aaf32c8ee72b906f8418fa871750c8a2e0cf413
font_02_sfnt_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 16072 bytes
SHA-256: 8f4d3222c14f42a62bce4a2f29c7a66401e04fed9b7af32d9b400a29b3abb19f