Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47ce9c5c798cbc2…

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 05:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e750af09bf58ec5d34eb0992af36a612 SHA-1: 2c0a43a8ca16fe901ebdbd621d374679971ec938 SHA-256: f47ce9c5c798cbc22d9aedbc8c768323109b5763cbb6749bf517f5cd337a6c03
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious domains and structured as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or malware distribution campaign. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://ecilingirler.com/resimler/files/tatevojoduvufofilufa.pdf In PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/61499327288.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/mamosazebenasomajegut.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/filalivazabofeguwomud.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/044723a0dfb5527849bc337bddfe6719/fewofosis.pdfIn PDF document text
    • http://aven.su/userfiles/file/fokejokizutagikuruf.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/45966487318.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210911181219820376zd0wejmwh73g.pdfIn PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/ginipakubamutatetawu.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/pexelu.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/dufupejipesagiguj.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021091207585447.pdfIn PDF document text
    • http://arsvet.ru/img/upload/85473061139.pdfIn PDF document text
    • http://alltechsro.cz/files/43742465946.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/56993919523.pdfIn PDF document text
    • https://x-software.cz/data/file/11442688422.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/doxawebixawix.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/jalipi.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/koxebabaku.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/65440012687.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/daruv.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/11245040217.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/kogufubiwutafutoremik.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fed455c62e---lovagu.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/nolebudabajabeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=han+esports+mlPDF 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_off0000daf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF4 17612 bytes
SHA-256: 3ed7ccceba76c5d9a2816e3ca86c957cdbfa80aa421d9330f6946561953f5ea3
font_01_sfnt_off000108ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 10312 bytes
SHA-256: 1ed12bec5cd51d69df611f3401c138aa50a00539f54f8a3206a342bf93c2561b