Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e17d6122f01e50…

MALICIOUS

PDF

82.2 KB Created: 2021-10-18 15:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5ddc9103c706a719fd20d1564f862b13 SHA-1: cd8ce14b62ef90ce41f9cbf6f87056949eb0d8af SHA-256: a3e17d6122f01e50460fde2f8edd54e9a9d6ebe499300ebf35354c4851b65dda
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress uploads or disposable hosting, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/80418673456.pdf In PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/vudum.pdfIn PDF document text
    • http://jcpingie.be/public/files/gelifolelituw.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/nunaribuzopitijumolaw.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a5e98506b6196d2f1c24131a1f278feb/23360905812.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/jurotijazi.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/jefiwukebuvipezame.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/98039694971.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/692510770.pdfIn PDF document text
    • http://cityfate.com/files/files/xepokimubufani.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/dagezo.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/52764231266.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/pexer.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/lojamanetajebolav.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/10070456483.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/14903348332.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/dolexedowavu.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/pafebib.pdfIn PDF document text
    • http://coca-colalife.eu/userfiles/file/45690409490.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/47065423562.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/84997140431.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16147ec95eb621---20911138006.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/17742829193.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3rfa6hmvcjp5jsjdvs15dosopf/33997603847.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/86575559220.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/EqozwcbAC44/uplcv?utm_term=it+essentials+chapter+final+exam+answersPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/52142999633.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E4 10764 bytes
SHA-256: 0eca197ec1379d7390d4aa50662e3969cf3d36945ce5d74647922b7bf84d0636
font_02_sfnt_off00010d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 17304 bytes
SHA-256: 93c3ef9b19f1c6105e3c9823359e260fe7c48926bab40af58e8bdff020c4f148