Malicious PDF — malware analysis report

Static analysis result for SHA-256 de9d4296688189d5…

MALICIOUS

PDF

86.7 KB Created: 2021-09-11 07:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f891d4c64fb6a1cba70ab49ae29c4652 SHA-1: 15924ad170c79091e3426085ffd3a2c49afde01b SHA-256: de9d4296688189d5e03b84d79b7f6fef5ca0803a0fcb874d2900ae9365c9b6b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains numerous embedded URLs, many of which point to disposable hosting and form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of a link farm suggests an attempt to obscure the final destination or host multiple malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1c117c6e0---77666961084.pdf In PDF document text
    • http://madmojo.com/fckupload/file/42427578398.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/55349921853.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/54350581800.pdfIn PDF document text
    • http://ipceurope.com/assets/file/73792934881.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109040722506582.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/64323261016.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/nunesanubejof.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/modazo.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/80631517381.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/sasarasazonoxage.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/96697604735.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/simakurofir.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/14473099595.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/zularoxurigewirevebuta.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/18737920555.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139198727751---15033842701.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/didamobatubefumub.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/zodorote.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/31766164160.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/minudufizeledasu.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/kupukaluzumatox.pdfIn PDF document text
    • http://ymmicro.com/files/files/nufedofusinaxuvaxolobomo.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/roliduverixakim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=miui+12+stop+adsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 2792 bytes
SHA-256: 0fb82d82d818c15dfa3497ac167ec2eb3014143b21059f3651cee827d7a82192
font_01_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 10268 bytes
SHA-256: 722279ca8c32581911e9672c8d368015651148ca4b0ea774ebdd92bee4510059
font_02_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 18492 bytes
SHA-256: 80e1171a5ed7aeb722f8c840a1b93593fd68b3581f62e249f99bce12ea277d56

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