Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5e59d43f181a3e…

MALICIOUS

PDF

88.9 KB Created: 2021-08-12 17:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 545b5be7cfebe3c617582346a471ac62 SHA-1: 895a31fff600704dc2be26496047d037ed312ab4 SHA-256: aa5e59d43f181a3eb01c6f7c1727a50bc575b990e0cbd9f72eba9854d0ac3b8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of many external URIs and a link farm heuristic strongly indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://ingenermarket.ru/userfiles/xinulilojixedosademomilu.pdf In PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ruvmv6tr790mjhhab5oo1c2upd/bisanalowamekezixifigog.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/famupoperugajarelurepune.pdfIn PDF document text
    • https://mfdesign.hu/files/file/nexijiselovagotenenubanij.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcda8df0c5---dawaresoribuvitufofi.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606db2ee9d9d5---fazapuli.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e82168c79---vowenafegasemoj.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6db1bcac25---naguxabusu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160840669f21e9---40055535634.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1425f67ec261386325f1f6c3580244ea/31510153201.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/82843774351.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16079320f0f9f8---rolamaxukebodosugivasaz.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/4232113289.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/10166958367.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/61487603560.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/98d594d688c057867840aeb77c7d6f20/rapixarefakavusog.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8565e010b76b324de6e36443d698c5a6/luwusitam.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8bc7ce9d---7998498182.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/bufemipinogareba.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/96339421977.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/39957834143.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/29677430008.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/36474082452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=spell+bee+words+for+grade+2+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_off0000fa7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11291 16320 bytes
SHA-256: d8afe48e430841964522cdd688023cc7225f4812fb44d4e3b93838c215d7512d
font_02_sfnt_off00013c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7A 10800 bytes
SHA-256: ccd2ccaf299c648309a4301f1b6bc7800807c4939ad8d36b21789078ec368a6a

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