Malicious PDF — malware analysis report

Static analysis result for SHA-256 296609abc8565aa2…

MALICIOUS

PDF

76.5 KB Created: 2021-09-30 20:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 988463f4c8d5728b4202307910d10903 SHA-1: 68c6fc168b3b389dd8b31e8459b992360fce079b SHA-256: 296609abc8565aa22695ad59d2b36a9dc8e11c04822670da6ad16b985bc97b68
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting and compromised CMS uploads suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161458c0bb58b2---tined.pdf In PDF document text
    • http://acunambalaj.com/adenoto/upload/files/fufuvigipedironovudipu.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/gunikoxidewegatupuzi.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/13ab8e3fe3677fd240b5e49c8dd14a84/zovogijelogaxejegadubu.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1615456dab58e6---refutawi.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/23646446644.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/kizazaxexu.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109021416238474.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/lepagifebenaradudopegadu.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/zosesebifefodik.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/7920950900.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/vebax.pdfIn PDF document text
    • http://vhshf.de/File/xelupo.pdfIn PDF document text
    • http://anton-joyeros.shopcloud.es/ckfinder/userfiles/files/sajirigalog.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/53471422176.pdfIn PDF document text
    • http://sarvodurys.com/userfiles/file/wawisa.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/dejosunegudikixotarudaz.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/28970093045.pdfIn PDF document text
    • http://oilspecchem.com/files/76688303564.pdfIn PDF document text
    • https://www.colegiumaniucarei.ro/ckfinder/userfiles/files/37935413791.pdfIn PDF document text
    • http://mosjob.ru/images/file/55323465846.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/sujubiditanoneneludo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=home+design+3d+apk+full+version+crackPDF 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_off0000c0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E0 18240 bytes
SHA-256: 17ab8568e3fbcdede3d4524a3fdaba2a9dd4f7e14226a151201ee663cb821f0d
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 11284 bytes
SHA-256: 8a5d6a42b4fa487066813a50f6731f90b6f0ee2ab80aa9e8d6fcbf4a8ac4cbf9
font_02_sfnt_off00010a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1