Malicious PDF — malware analysis report

Static analysis result for SHA-256 517a468ba2acb995…

MALICIOUS

PDF

72.8 KB Created: 2021-09-12 23:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dddd0de34b2af5d624fa70162339f504 SHA-1: 17c6d6b0db95e642a6fd706413ee939948db247f SHA-256: 517a468ba2acb99532b55c6a89a712e949edb90e4080c0bfc3f54bc29dc31a1e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code upon opening. It also features a high number of external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 http://ghinelliarchitettura.it/userfiles/files/pitinevalasubupidubeve.pdf In PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/fimiderisebogagum.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/vovivipugufe.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/81424857460.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///65643818747.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/32429454406.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/kefititanim.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210901091153467584jmz61s.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/narotis.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/fopegedugubogumosuraberag.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/56139989923.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/jiraxid.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138cecd07ca8---kakugakifuvavikusezuno.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/zisubidibomigarowope.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/46826279370.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac2f0f379a---96900283124.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/57842323425.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210908223813.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/22975165315.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tamisudumulom.pdfIn PDF document text
    • https://dafelia.com/files/28028867572.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/77987713730.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/bupawaxujuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=mektoub+my+love+intermezzo+movie+onlinePDF 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_off0000b980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB980 17012 bytes
SHA-256: 9da3e91db4ca079b754a4a87ff98097477924a42a657f42a6cb6f7f26985505d
font_01_sfnt_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 10504 bytes
SHA-256: 95a836abca1403e8b03c059f3ff888bf120ec18c7a94528f87b8af7183f91a88

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